diff --git a/lib/composer/composer/autoload_classmap.php b/lib/composer/composer/autoload_classmap.php
index 63ba07e2e4fc5..e92725d814bd2 100644
--- a/lib/composer/composer/autoload_classmap.php
+++ b/lib/composer/composer/autoload_classmap.php
@@ -422,6 +422,7 @@
     'OCP\\Files\\UnseekableException' => $baseDir . '/lib/public/Files/UnseekableException.php',
     'OCP\\Files_FullTextSearch\\Model\\AFilesDocument' => $baseDir . '/lib/public/Files_FullTextSearch/Model/AFilesDocument.php',
     'OCP\\FullTextSearch\\Exceptions\\FullTextSearchAppNotAvailableException' => $baseDir . '/lib/public/FullTextSearch/Exceptions/FullTextSearchAppNotAvailableException.php',
+    'OCP\\FullTextSearch\\Exceptions\\FullTextSearchIndexNotAvailableException' => $baseDir . '/lib/public/FullTextSearch/Exceptions/FullTextSearchIndexNotAvailableException.php',
     'OCP\\FullTextSearch\\IFullTextSearchManager' => $baseDir . '/lib/public/FullTextSearch/IFullTextSearchManager.php',
     'OCP\\FullTextSearch\\IFullTextSearchPlatform' => $baseDir . '/lib/public/FullTextSearch/IFullTextSearchPlatform.php',
     'OCP\\FullTextSearch\\IFullTextSearchProvider' => $baseDir . '/lib/public/FullTextSearch/IFullTextSearchProvider.php',
diff --git a/lib/composer/composer/autoload_static.php b/lib/composer/composer/autoload_static.php
index bf1a13d49dec0..0746fa5c9b0f9 100644
--- a/lib/composer/composer/autoload_static.php
+++ b/lib/composer/composer/autoload_static.php
@@ -455,6 +455,7 @@ class ComposerStaticInit749170dad3f5e7f9ca158f5a9f04f6a2
         'OCP\\Files\\UnseekableException' => __DIR__ . '/../../..' . '/lib/public/Files/UnseekableException.php',
         'OCP\\Files_FullTextSearch\\Model\\AFilesDocument' => __DIR__ . '/../../..' . '/lib/public/Files_FullTextSearch/Model/AFilesDocument.php',
         'OCP\\FullTextSearch\\Exceptions\\FullTextSearchAppNotAvailableException' => __DIR__ . '/../../..' . '/lib/public/FullTextSearch/Exceptions/FullTextSearchAppNotAvailableException.php',
+        'OCP\\FullTextSearch\\Exceptions\\FullTextSearchIndexNotAvailableException' => __DIR__ . '/../../..' . '/lib/public/FullTextSearch/Exceptions/FullTextSearchIndexNotAvailableException.php',
         'OCP\\FullTextSearch\\IFullTextSearchManager' => __DIR__ . '/../../..' . '/lib/public/FullTextSearch/IFullTextSearchManager.php',
         'OCP\\FullTextSearch\\IFullTextSearchPlatform' => __DIR__ . '/../../..' . '/lib/public/FullTextSearch/IFullTextSearchPlatform.php',
         'OCP\\FullTextSearch\\IFullTextSearchProvider' => __DIR__ . '/../../..' . '/lib/public/FullTextSearch/IFullTextSearchProvider.php',
diff --git a/lib/private/FullTextSearch/FullTextSearchManager.php b/lib/private/FullTextSearch/FullTextSearchManager.php
index 8d850513949c5..acaf519209b62 100644
--- a/lib/private/FullTextSearch/FullTextSearchManager.php
+++ b/lib/private/FullTextSearch/FullTextSearchManager.php
@@ -39,47 +39,35 @@
  * @package OC\FullTextSearch
  */
 class FullTextSearchManager implements IFullTextSearchManager {
-	/** @var IProviderService */
-	private $providerService;
+	private ?IProviderService $providerService;
 
-	/** @var IIndexService */
-	private $indexService;
-
-	/** @var ISearchService */
-	private $searchService;
+	private ?IIndexService $indexService;
 
+	private ?ISearchService $searchService;
 
 	/**
 	 * @since 15.0.0
-	 *
-	 * @param IProviderService $providerService
 	 */
-	public function registerProviderService(IProviderService $providerService) {
+	public function registerProviderService(IProviderService $providerService): void {
 		$this->providerService = $providerService;
 	}
 
 	/**
 	 * @since 15.0.0
-	 *
-	 * @param IIndexService $indexService
 	 */
-	public function registerIndexService(IIndexService $indexService) {
+	public function registerIndexService(IIndexService $indexService): void {
 		$this->indexService = $indexService;
 	}
 
 	/**
 	 * @since 15.0.0
-	 *
-	 * @param ISearchService $searchService
 	 */
-	public function registerSearchService(ISearchService $searchService) {
+	public function registerSearchService(ISearchService $searchService): void {
 		$this->searchService = $searchService;
 	}
 
 	/**
 	 * @since 16.0.0
-	 *
-	 * @return bool
 	 */
 	public function isAvailable(): bool {
 		if ($this->indexService === null ||
@@ -93,7 +81,6 @@ public function isAvailable(): bool {
 
 
 	/**
-	 * @return IProviderService
 	 * @throws FullTextSearchAppNotAvailableException
 	 */
 	private function getProviderService(): IProviderService {
@@ -106,7 +93,6 @@ private function getProviderService(): IProviderService {
 
 
 	/**
-	 * @return IIndexService
 	 * @throws FullTextSearchAppNotAvailableException
 	 */
 	private function getIndexService(): IIndexService {
@@ -119,7 +105,6 @@ private function getIndexService(): IIndexService {
 
 
 	/**
-	 * @return ISearchService
 	 * @throws FullTextSearchAppNotAvailableException
 	 */
 	private function getSearchService(): ISearchService {
@@ -134,15 +119,12 @@ private function getSearchService(): ISearchService {
 	/**
 	 * @throws FullTextSearchAppNotAvailableException
 	 */
-	public function addJavascriptAPI() {
+	public function addJavascriptAPI(): void {
 		$this->getProviderService()->addJavascriptAPI();
 	}
 
 
 	/**
-	 * @param string $providerId
-	 *
-	 * @return bool
 	 * @throws FullTextSearchAppNotAvailableException
 	 */
 	public function isProviderIndexed(string $providerId): bool {
@@ -151,9 +133,6 @@ public function isProviderIndexed(string $providerId): bool {
 
 
 	/**
-	 * @param string $providerId
-	 * @param string $documentId
-	 * @return IIndex
 	 * @throws FullTextSearchAppNotAvailableException
 	 */
 	public function getIndex(string $providerId, string $documentId): IIndex {
@@ -161,46 +140,45 @@ public function getIndex(string $providerId, string $documentId): IIndex {
 	}
 
 	/**
-	 * @param string $providerId
-	 * @param string $documentId
-	 * @param string $userId
-	 * @param int $status
-	 *
 	 * @see IIndex for available value for $status.
 	 *
-	 * @return IIndex
 	 * @throws FullTextSearchAppNotAvailableException
 	 */
-	public function createIndex(string $providerId, string $documentId, string $userId, int $status = 0): IIndex {
+	public function createIndex(
+		string $providerId,
+		string $documentId,
+		string $userId,
+		int $status = 0,
+	): IIndex {
 		return $this->getIndexService()->createIndex($providerId, $documentId, $userId, $status);
 	}
 
 
 	/**
-	 * @param string $providerId
-	 * @param string $documentId
-	 * @param int $status
-	 * @param bool $reset
-	 *
 	 * @see IIndex for available value for $status.
 	 *
 	 * @throws FullTextSearchAppNotAvailableException
 	 */
-	public function updateIndexStatus(string $providerId, string $documentId, int $status, bool $reset = false) {
+	public function updateIndexStatus(
+		string $providerId,
+		string $documentId,
+		int $status,
+		bool $reset = false,
+	): void {
 		$this->getIndexService()->updateIndexStatus($providerId, $documentId, $status, $reset);
 	}
 
 	/**
-	 * @param string $providerId
-	 * @param array $documentIds
-	 * @param int $status
-	 * @param bool $reset
-	 *
 	 * @see IIndex for available value for $status.
 	 *
 	 * @throws FullTextSearchAppNotAvailableException
 	 */
-	public function updateIndexesStatus(string $providerId, array $documentIds, int $status, bool $reset = false) {
+	public function updateIndexesStatus(
+		string $providerId,
+		array $documentIds,
+		int $status,
+		bool $reset = false,
+	): void {
 		$this->getIndexService()->updateIndexesStatus($providerId, $documentIds, $status, $reset);
 	}
 
@@ -210,15 +188,12 @@ public function updateIndexesStatus(string $providerId, array $documentIds, int
 	 *
 	 * @throws FullTextSearchAppNotAvailableException
 	 */
-	public function updateIndexes(array $indexes) {
+	public function updateIndexes(array $indexes): void {
 		$this->getIndexService()->updateIndexes($indexes);
 	}
 
 
 	/**
-	 * @param array $request
-	 * @param string $userId
-	 *
 	 * @return ISearchResult[]
 	 * @throws FullTextSearchAppNotAvailableException
 	 */
diff --git a/lib/private/FullTextSearch/Model/DocumentAccess.php b/lib/private/FullTextSearch/Model/DocumentAccess.php
index cb2b95284f1d7..eecd038ca036b 100644
--- a/lib/private/FullTextSearch/Model/DocumentAccess.php
+++ b/lib/private/FullTextSearch/Model/DocumentAccess.php
@@ -49,23 +49,17 @@
  * @package OC\FullTextSearch\Model
  */
 final class DocumentAccess implements IDocumentAccess, JsonSerializable {
-	/** @var string */
-	private $ownerId;
+	private string $ownerId;
 
-	/** @var string */
-	private $viewerId = '';
+	private string $viewerId = '';
 
-	/** @var array */
-	private $users = [];
+	private array $users = [];
 
-	/** @var array */
-	private $groups = [];
+	private array $groups = [];
 
-	/** @var array */
-	private $circles = [];
+	private array $circles = [];
 
-	/** @var array */
-	private $links = [];
+	private array $links = [];
 
 
 	/**
@@ -74,8 +68,6 @@ final class DocumentAccess implements IDocumentAccess, JsonSerializable {
 	 * @since 16.0.0
 	 *
 	 * IDocumentAccess constructor.
-	 *
-	 * @param string $ownerId
 	 */
 	public function __construct(string $ownerId = '') {
 		$this->setOwnerId($ownerId);
@@ -86,10 +78,6 @@ public function __construct(string $ownerId = '') {
 	 * Set the Owner of the document.
 	 *
 	 * @since 16.0.0
-	 *
-	 * @param string $ownerId
-	 *
-	 * @return IDocumentAccess
 	 */
 	public function setOwnerId(string $ownerId): IDocumentAccess {
 		$this->ownerId = $ownerId;
@@ -101,8 +89,6 @@ public function setOwnerId(string $ownerId): IDocumentAccess {
 	 * Get the Owner of the document.
 	 *
 	 * @since 16.0.0
-	 *
-	 * @return string
 	 */
 	public function getOwnerId(): string {
 		return $this->ownerId;
@@ -113,10 +99,6 @@ public function getOwnerId(): string {
 	 * Set the viewer of the document.
 	 *
 	 * @since 16.0.0
-	 *
-	 * @param string $viewerId
-	 *
-	 * @return IDocumentAccess
 	 */
 	public function setViewerId(string $viewerId): IDocumentAccess {
 		$this->viewerId = $viewerId;
@@ -128,8 +110,6 @@ public function setViewerId(string $viewerId): IDocumentAccess {
 	 * Get the viewer of the document.
 	 *
 	 * @since 16.0.0
-	 *
-	 * @return string
 	 */
 	public function getViewerId(): string {
 		return $this->viewerId;
@@ -140,10 +120,6 @@ public function getViewerId(): string {
 	 * Set the list of users that have read access to the document.
 	 *
 	 * @since 16.0.0
-	 *
-	 * @param array $users
-	 *
-	 * @return IDocumentAccess
 	 */
 	public function setUsers(array $users): IDocumentAccess {
 		$this->users = $users;
@@ -155,10 +131,6 @@ public function setUsers(array $users): IDocumentAccess {
 	 * Add an entry to the list of users that have read access to the document.
 	 *
 	 * @since 16.0.0
-	 *
-	 * @param string $user
-	 *
-	 * @return IDocumentAccess
 	 */
 	public function addUser(string $user): IDocumentAccess {
 		$this->users[] = $user;
@@ -171,10 +143,6 @@ public function addUser(string $user): IDocumentAccess {
 	 * document.
 	 *
 	 * @since 16.0.0
-	 *
-	 * @param array $users
-	 *
-	 * @return IDocumentAccess
 	 */
 	public function addUsers($users): IDocumentAccess {
 		$this->users = array_merge($this->users, $users);
@@ -186,8 +154,6 @@ public function addUsers($users): IDocumentAccess {
 	 * Get the complete list of users that have read access to the document.
 	 *
 	 * @since 16.0.0
-	 *
-	 * @return array
 	 */
 	public function getUsers(): array {
 		return $this->users;
@@ -198,10 +164,6 @@ public function getUsers(): array {
 	 * Set the list of groups that have read access to the document.
 	 *
 	 * @since 16.0.0
-	 *
-	 * @param array $groups
-	 *
-	 * @return IDocumentAccess
 	 */
 	public function setGroups(array $groups): IDocumentAccess {
 		$this->groups = $groups;
@@ -213,10 +175,6 @@ public function setGroups(array $groups): IDocumentAccess {
 	 * Add an entry to the list of groups that have read access to the document.
 	 *
 	 * @since 16.0.0
-	 *
-	 * @param string $group
-	 *
-	 * @return IDocumentAccess
 	 */
 	public function addGroup(string $group): IDocumentAccess {
 		$this->groups[] = $group;
@@ -229,12 +187,8 @@ public function addGroup(string $group): IDocumentAccess {
 	 * document.
 	 *
 	 * @since 16.0.0
-	 *
-	 * @param array $groups
-	 *
-	 * @return IDocumentAccess
 	 */
-	public function addGroups(array $groups) {
+	public function addGroups(array $groups): IDocumentAccess {
 		$this->groups = array_merge($this->groups, $groups);
 
 		return $this;
@@ -244,8 +198,6 @@ public function addGroups(array $groups) {
 	 * Get the complete list of groups that have read access to the document.
 	 *
 	 * @since 16.0.0
-	 *
-	 * @return array
 	 */
 	public function getGroups(): array {
 		return $this->groups;
@@ -256,10 +208,6 @@ public function getGroups(): array {
 	 * Set the list of circles that have read access to the document.
 	 *
 	 * @since 16.0.0
-	 *
-	 * @param array $circles
-	 *
-	 * @return IDocumentAccess
 	 */
 	public function setCircles(array $circles): IDocumentAccess {
 		$this->circles = $circles;
@@ -271,10 +219,6 @@ public function setCircles(array $circles): IDocumentAccess {
 	 * Add an entry to the list of circles that have read access to the document.
 	 *
 	 * @since 16.0.0
-	 *
-	 * @param string $circle
-	 *
-	 * @return IDocumentAccess
 	 */
 	public function addCircle(string $circle): IDocumentAccess {
 		$this->circles[] = $circle;
@@ -287,10 +231,6 @@ public function addCircle(string $circle): IDocumentAccess {
 	 * document.
 	 *
 	 * @since 16.0.0
-	 *
-	 * @param array $circles
-	 *
-	 * @return IDocumentAccess
 	 */
 	public function addCircles(array $circles): IDocumentAccess {
 		$this->circles = array_merge($this->circles, $circles);
@@ -302,8 +242,6 @@ public function addCircles(array $circles): IDocumentAccess {
 	 * Get the complete list of circles that have read access to the document.
 	 *
 	 * @since 16.0.0
-	 *
-	 * @return array
 	 */
 	public function getCircles(): array {
 		return $this->circles;
@@ -314,10 +252,6 @@ public function getCircles(): array {
 	 * Set the list of links that have read access to the document.
 	 *
 	 * @since 16.0.0
-	 *
-	 * @param array $links
-	 *
-	 * @return IDocumentAccess
 	 */
 	public function setLinks(array $links): IDocumentAccess {
 		$this->links = $links;
@@ -329,8 +263,6 @@ public function setLinks(array $links): IDocumentAccess {
 	 * Get the list of links that have read access to the document.
 	 *
 	 * @since 16.0.0
-	 *
-	 * @return array
 	 */
 	public function getLinks(): array {
 		return $this->links;
@@ -339,8 +271,6 @@ public function getLinks(): array {
 
 	/**
 	 * @since 16.0.0
-	 *
-	 * @return array
 	 */
 	public function jsonSerialize(): array {
 		return [
diff --git a/lib/private/FullTextSearch/Model/IndexDocument.php b/lib/private/FullTextSearch/Model/IndexDocument.php
index 74788463693ad..1b2e0eb58962f 100644
--- a/lib/private/FullTextSearch/Model/IndexDocument.php
+++ b/lib/private/FullTextSearch/Model/IndexDocument.php
@@ -26,6 +26,7 @@
 namespace OC\FullTextSearch\Model;
 
 use JsonSerializable;
+use OCP\FullTextSearch\Exceptions\FullTextSearchIndexNotAvailableException;
 use OCP\FullTextSearch\Model\IDocumentAccess;
 use OCP\FullTextSearch\Model\IIndex;
 use OCP\FullTextSearch\Model\IIndexDocument;
@@ -47,62 +48,41 @@
  * @package OC\FullTextSearch\Model
  */
 class IndexDocument implements IIndexDocument, JsonSerializable {
-	/** @var string */
-	protected $id = '';
+	protected string $id = '';
 
-	/** @var string */
-	protected $providerId = '';
+	protected DocumentAccess $access;
 
-	/** @var DocumentAccess */
-	protected $access;
+	protected ?IIndex $index = null;
 
-	/** @var IIndex */
-	protected $index;
+	protected int $modifiedTime = 0;
 
-	/** @var int */
-	protected $modifiedTime = 0;
+	protected string $source = '';
 
-	/** @var string */
-	protected $source = '';
+	protected array $tags = [];
 
-	/** @var array */
-	protected $tags = [];
+	protected array $metaTags = [];
 
-	/** @var array */
-	protected $metaTags = [];
+	protected array $subTags = [];
 
-	/** @var array */
-	protected $subTags = [];
+	protected string $title = '';
 
-	/** @var string */
-	protected $title = '';
+	protected string $content = '';
 
-	/** @var string */
-	protected $content = '';
+	protected string $hash = '';
 
-	/** @var string */
-	protected $hash = '';
+	protected array $parts = [];
 
-	/** @var array */
-	protected $parts = [];
+	protected string $link = '';
 
-	/** @var string */
-	protected $link = '';
+	protected array $more = [];
 
-	/** @var array */
-	protected $more = [];
+	protected array $excerpts = [];
 
-	/** @var array */
-	protected $excerpts = [];
+	protected string $score = '';
 
-	/** @var string */
-	protected $score = '';
+	protected array $info = [];
 
-	/** @var array */
-	protected $info = [];
-
-	/** @var int */
-	protected $contentEncoded = 0;
+	protected int $contentEncoded = 0;
 
 
 	/**
@@ -112,12 +92,11 @@ class IndexDocument implements IIndexDocument, JsonSerializable {
 	 * and the Id of the original document.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $providerId
-	 * @param string $documentId
 	 */
-	public function __construct(string $providerId, string $documentId) {
-		$this->providerId = $providerId;
+	public function __construct(
+		protected string $providerId,
+		string $documentId,
+	) {
 		$this->id = $documentId;
 	}
 
@@ -126,8 +105,6 @@ public function __construct(string $providerId, string $documentId) {
 	 * Returns the Id of the original document.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return string
 	 */
 	final public function getId(): string {
 		return $this->id;
@@ -138,8 +115,6 @@ final public function getId(): string {
 	 * Returns the Id of the provider.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return string
 	 */
 	final public function getProviderId(): string {
 		return $this->providerId;
@@ -152,10 +127,6 @@ final public function getProviderId(): string {
 	 * @see IIndex
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param IIndex $index
-	 *
-	 * @return IIndexDocument
 	 */
 	final public function setIndex(IIndex $index): IIndexDocument {
 		$this->index = $index;
@@ -166,11 +137,14 @@ final public function setIndex(IIndex $index): IIndexDocument {
 	/**
 	 * Get the Index.
 	 *
+	 * @throws FullTextSearchIndexNotAvailableException
 	 * @since 15.0.0
-	 *
-	 * @return IIndex
 	 */
 	final public function getIndex(): IIndex {
+		if ($this->index === null) {
+			throw new FullTextSearchIndexNotAvailableException('No IIndex generated');
+		}
+
 		return $this->index;
 	}
 
@@ -178,22 +152,15 @@ final public function getIndex(): IIndex {
 	 * return if Index is defined.
 	 *
 	 * @since 16.0.0
-	 *
-	 * @return bool
 	 */
 	final public function hasIndex(): bool {
-		return ($this->index !== null);
+		return $this->index !== null;
 	}
 
-
 	/**
 	 * Set the modified time of the original document.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param int $modifiedTime
-	 *
-	 * @return IIndexDocument
 	 */
 	final public function setModifiedTime(int $modifiedTime): IIndexDocument {
 		$this->modifiedTime = $modifiedTime;
@@ -205,8 +172,6 @@ final public function setModifiedTime(int $modifiedTime): IIndexDocument {
 	 * Get the modified time of the original document.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return int
 	 */
 	final public function getModifiedTime(): int {
 		return $this->modifiedTime;
@@ -216,10 +181,6 @@ final public function getModifiedTime(): int {
 	 * Check if the original document of the IIndexDocument is older than $time.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param int $time
-	 *
-	 * @return bool
 	 */
 	final public function isOlderThan(int $time): bool {
 		return ($this->modifiedTime < $time);
@@ -232,10 +193,6 @@ final public function isOlderThan(int $time): bool {
 	 * @see IDocumentAccess
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param IDocumentAccess $access
-	 *
-	 * @return $this
 	 */
 	final public function setAccess(IDocumentAccess $access): IIndexDocument {
 		$this->access = $access;
@@ -247,8 +204,6 @@ final public function setAccess(IDocumentAccess $access): IIndexDocument {
 	 * Get the IDocumentAccess related to the original document.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return IDocumentAccess
 	 */
 	final public function getAccess(): IDocumentAccess {
 		return $this->access;
@@ -259,10 +214,6 @@ final public function getAccess(): IDocumentAccess {
 	 * Add a tag to the list.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $tag
-	 *
-	 * @return IIndexDocument
 	 */
 	final public function addTag(string $tag): IIndexDocument {
 		$this->tags[] = $tag;
@@ -274,10 +225,6 @@ final public function addTag(string $tag): IIndexDocument {
 	 * Set the list of tags assigned to the original document.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param array $tags
-	 *
-	 * @return IIndexDocument
 	 */
 	final public function setTags(array $tags): IIndexDocument {
 		$this->tags = $tags;
@@ -289,8 +236,6 @@ final public function setTags(array $tags): IIndexDocument {
 	 * Get the list of tags assigned to the original document.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return array
 	 */
 	final public function getTags(): array {
 		return $this->tags;
@@ -301,10 +246,6 @@ final public function getTags(): array {
 	 * Add a meta tag to the list.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $tag
-	 *
-	 * @return IIndexDocument
 	 */
 	final public function addMetaTag(string $tag): IIndexDocument {
 		$this->metaTags[] = $tag;
@@ -316,10 +257,6 @@ final public function addMetaTag(string $tag): IIndexDocument {
 	 * Set the list of meta tags assigned to the original document.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param array $tags
-	 *
-	 * @return IIndexDocument
 	 */
 	final public function setMetaTags(array $tags): IIndexDocument {
 		$this->metaTags = $tags;
@@ -331,8 +268,6 @@ final public function setMetaTags(array $tags): IIndexDocument {
 	 * Get the list of meta tags assigned to the original document.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return array
 	 */
 	final public function getMetaTags(): array {
 		return $this->metaTags;
@@ -343,11 +278,6 @@ final public function getMetaTags(): array {
 	 * Add a sub tag to the list.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $sub
-	 * @param string $tag
-	 *
-	 * @return IIndexDocument
 	 */
 	final public function addSubTag(string $sub, string $tag): IIndexDocument {
 		if (!array_key_exists($sub, $this->subTags)) {
@@ -364,10 +294,6 @@ final public function addSubTag(string $sub, string $tag): IIndexDocument {
 	 * Set the list of sub tags assigned to the original document.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param array $tags
-	 *
-	 * @return IIndexDocument
 	 */
 	final public function setSubTags(array $tags): IIndexDocument {
 		$this->subTags = $tags;
@@ -381,10 +307,6 @@ final public function setSubTags(array $tags): IIndexDocument {
 	 * dimensional array.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param bool $formatted
-	 *
-	 * @return array
 	 */
 	final public function getSubTags(bool $formatted = false): array {
 		if ($formatted === false) {
@@ -408,10 +330,6 @@ final public function getSubTags(bool $formatted = false): array {
 	 * Set the source of the original document.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $source
-	 *
-	 * @return IIndexDocument
 	 */
 	final public function setSource(string $source): IIndexDocument {
 		$this->source = $source;
@@ -423,8 +341,6 @@ final public function setSource(string $source): IIndexDocument {
 	 * Get the source of the original document.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return string
 	 */
 	final public function getSource(): string {
 		return $this->source;
@@ -435,10 +351,6 @@ final public function getSource(): string {
 	 * Set the title of the original document.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $title
-	 *
-	 * @return IIndexDocument
 	 */
 	final public function setTitle(string $title): IIndexDocument {
 		$this->title = $title;
@@ -450,8 +362,6 @@ final public function setTitle(string $title): IIndexDocument {
 	 * Get the title of the original document.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return string
 	 */
 	final public function getTitle(): string {
 		return $this->title;
@@ -464,11 +374,6 @@ final public function getTitle(): string {
 	 * encoded in base64.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $content
-	 * @param int $encoded
-	 *
-	 * @return IIndexDocument
 	 */
 	final public function setContent(string $content, int $encoded = 0): IIndexDocument {
 		$this->content = $content;
@@ -481,8 +386,6 @@ final public function setContent(string $content, int $encoded = 0): IIndexDocum
 	 * Get the content of the original document.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return string
 	 */
 	final public function getContent(): string {
 		return $this->content;
@@ -492,8 +395,6 @@ final public function getContent(): string {
 	 * Returns the type of the encoding on the content.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return int
 	 */
 	final public function isContentEncoded(): int {
 		return $this->contentEncoded;
@@ -503,8 +404,6 @@ final public function isContentEncoded(): int {
 	 * Return the size of the content.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return int
 	 */
 	final public function getContentSize(): int {
 		return strlen($this->getContent());
@@ -512,11 +411,9 @@ final public function getContentSize(): int {
 
 
 	/**
-	 * Generate an hash, based on the content of the original document.
+	 * Generate a hash, based on the content of the original document.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return IIndexDocument
 	 */
 	final public function initHash(): IIndexDocument {
 		if ($this->getContent() === '' || is_null($this->getContent())) {
@@ -532,10 +429,6 @@ final public function initHash(): IIndexDocument {
 	 * Set the hash of the original document.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $hash
-	 *
-	 * @return IIndexDocument
 	 */
 	final public function setHash(string $hash): IIndexDocument {
 		$this->hash = $hash;
@@ -547,8 +440,6 @@ final public function setHash(string $hash): IIndexDocument {
 	 * Get the hash of the original document.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return string
 	 */
 	final public function getHash(): string {
 		return $this->hash;
@@ -562,11 +453,6 @@ final public function getHash(): string {
 	 * $part string.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $part
-	 * @param string $content
-	 *
-	 * @return IIndexDocument
 	 */
 	final public function addPart(string $part, string $content): IIndexDocument {
 		$this->parts[$part] = $content;
@@ -578,10 +464,6 @@ final public function addPart(string $part, string $content): IIndexDocument {
 	 * Set all parts and their content.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param array $parts
-	 *
-	 * @return IIndexDocument
 	 */
 	final public function setParts(array $parts): IIndexDocument {
 		$this->parts = $parts;
@@ -593,8 +475,6 @@ final public function setParts(array $parts): IIndexDocument {
 	 * Get all parts of the IIndexDocument.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return array
 	 */
 	final public function getParts(): array {
 		return $this->parts;
@@ -605,10 +485,6 @@ final public function getParts(): array {
 	 * Add a link, usable by the frontend.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $link
-	 *
-	 * @return IIndexDocument
 	 */
 	final public function setLink(string $link): IIndexDocument {
 		$this->link = $link;
@@ -620,8 +496,6 @@ final public function setLink(string $link): IIndexDocument {
 	 * Get the link.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return string
 	 */
 	final public function getLink(): string {
 		return $this->link;
@@ -632,10 +506,6 @@ final public function getLink(): string {
 	 * Set more information that couldn't be set using other method.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param array $more
-	 *
-	 * @return IIndexDocument
 	 */
 	final public function setMore(array $more): IIndexDocument {
 		$this->more = $more;
@@ -647,8 +517,6 @@ final public function setMore(array $more): IIndexDocument {
 	 * Get more information.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return array
 	 */
 	final public function getMore(): array {
 		return $this->more;
@@ -660,11 +528,6 @@ final public function getMore(): array {
 	 * on the search request.
 	 *
 	 * @since 16.0.0
-	 *
-	 * @param string $source
-	 * @param string $excerpt
-	 *
-	 * @return IIndexDocument
 	 */
 	final public function addExcerpt(string $source, string $excerpt): IIndexDocument {
 		$this->excerpts[] =
@@ -681,10 +544,6 @@ final public function addExcerpt(string $source, string $excerpt): IIndexDocumen
 	 * Set all excerpts of the content of the original document.
 	 *
 	 * @since 16.0.0
-	 *
-	 * @param array $excerpts
-	 *
-	 * @return IIndexDocument
 	 */
 	final public function setExcerpts(array $excerpts): IIndexDocument {
 		$new = [];
@@ -704,8 +563,6 @@ final public function setExcerpts(array $excerpts): IIndexDocument {
 	 * Get all excerpts of the content of the original document.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return array
 	 */
 	final public function getExcerpts(): array {
 		return $this->excerpts;
@@ -715,9 +572,6 @@ final public function getExcerpts(): array {
 	 * Clean excerpt.
 	 *
 	 * @since 16.0.0
-	 *
-	 * @param string $excerpt
-	 * @return string
 	 */
 	private function cleanExcerpt(string $excerpt): string {
 		$excerpt = str_replace("\\n", ' ', $excerpt);
@@ -736,10 +590,6 @@ private function cleanExcerpt(string $excerpt): string {
 	 * request.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $score
-	 *
-	 * @return IIndexDocument
 	 */
 	final public function setScore(string $score): IIndexDocument {
 		$this->score = $score;
@@ -751,8 +601,6 @@ final public function setScore(string $score): IIndexDocument {
 	 * Get the score.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return string
 	 */
 	final public function getScore(): string {
 		return $this->score;
@@ -767,11 +615,6 @@ final public function getScore(): string {
 	 * indexing.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $info
-	 * @param string $value
-	 *
-	 * @return IIndexDocument
 	 */
 	final public function setInfo(string $info, string $value): IIndexDocument {
 		$this->info[$info] = $value;
@@ -783,11 +626,6 @@ final public function setInfo(string $info, string $value): IIndexDocument {
 	 * Get an information about a document. (string)
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $info
-	 * @param string $default
-	 *
-	 * @return string
 	 */
 	final public function getInfo(string $info, string $default = ''): string {
 		if (!key_exists($info, $this->info)) {
@@ -805,11 +643,6 @@ final public function getInfo(string $info, string $default = ''): string {
 	 * indexing.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $info
-	 * @param array $value
-	 *
-	 * @return IIndexDocument
 	 */
 	final public function setInfoArray(string $info, array $value): IIndexDocument {
 		$this->info[$info] = $value;
@@ -821,11 +654,6 @@ final public function setInfoArray(string $info, array $value): IIndexDocument {
 	 * Get an information about a document. (array)
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $info
-	 * @param array $default
-	 *
-	 * @return array
 	 */
 	final public function getInfoArray(string $info, array $default = []): array {
 		if (!key_exists($info, $this->info)) {
@@ -843,11 +671,6 @@ final public function getInfoArray(string $info, array $default = []): array {
 	 * indexing.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $info
-	 * @param int $value
-	 *
-	 * @return IIndexDocument
 	 */
 	final public function setInfoInt(string $info, int $value): IIndexDocument {
 		$this->info[$info] = $value;
@@ -859,11 +682,6 @@ final public function setInfoInt(string $info, int $value): IIndexDocument {
 	 * Get an information about a document. (int)
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $info
-	 * @param int $default
-	 *
-	 * @return int
 	 */
 	final public function getInfoInt(string $info, int $default = 0): int {
 		if (!key_exists($info, $this->info)) {
@@ -881,11 +699,6 @@ final public function getInfoInt(string $info, int $default = 0): int {
 	 * indexing.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $info
-	 * @param bool $value
-	 *
-	 * @return IIndexDocument
 	 */
 	final public function setInfoBool(string $info, bool $value): IIndexDocument {
 		$this->info[$info] = $value;
@@ -897,11 +710,6 @@ final public function setInfoBool(string $info, bool $value): IIndexDocument {
 	 * Get an information about a document. (bool)
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $info
-	 * @param bool $default
-	 *
-	 * @return bool
 	 */
 	final public function getInfoBool(string $info, bool $default = false): bool {
 		if (!key_exists($info, $this->info)) {
@@ -915,13 +723,11 @@ final public function getInfoBool(string $info, bool $default = false): bool {
 	 * Get all info.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return array
 	 */
 	final public function getInfoAll(): array {
 		$info = [];
 		foreach ($this->info as $k => $v) {
-			if (substr($k, 0, 1) === '_') {
+			if (str_starts_with($k, '_')) {
 				continue;
 			}
 
diff --git a/lib/private/FullTextSearch/Model/SearchOption.php b/lib/private/FullTextSearch/Model/SearchOption.php
index 91f45db5fb481..c8fa2b22a2469 100644
--- a/lib/private/FullTextSearch/Model/SearchOption.php
+++ b/lib/private/FullTextSearch/Model/SearchOption.php
@@ -36,22 +36,6 @@
  * @package OC\FullTextSearch\Model
  */
 final class SearchOption implements ISearchOption, JsonSerializable {
-	/** @var string */
-	private $name = '';
-
-	/** @var string */
-	private $title = '';
-
-	/** @var string */
-	private $type = '';
-
-	/** @var string */
-	private $size = '';
-
-	/** @var string */
-	private $placeholder = '';
-
-
 	/**
 	 *     *
 	 *
@@ -104,37 +88,28 @@ final class SearchOption implements ISearchOption, JsonSerializable {
 	/**
 	 * ISearchOption constructor.
 	 *
-	 * Some value can be setduring the creation of the object.
+	 * Some value can be set during the creation of the object.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $name
-	 * @param string $title
-	 * @param string $type
-	 * @param string $size
-	 * @param string $placeholder
 	 */
-	public function __construct(string $name = '', string $title = '', string $type = '', string $size = '', string $placeholder = '') {
-		$this->name = $name;
-		$this->title = $title;
-		$this->type = $type;
-		$this->size = $size;
-		$this->placeholder = $placeholder;
+	public function __construct(
+		private string $name = '',
+		private string $title = '',
+		private string $type = '',
+		private string $size = '',
+		private string $placeholder = '',
+	) {
 	}
 
 
 	/**
 	 * Set the name/key of the option.
-	 * The string should only contains alphanumerical chars and underscore.
-	 * The key can be retrieve when using ISearchRequest::getOption
+	 * The string should only contain alphanumerical chars and underscore.
+	 * The key can be retrieved when using ISearchRequest::getOption
 	 *
 	 * @see ISearchRequest::getOption
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $name
-	 *
-	 * @return ISearchOption
 	 */
 	public function setName(string $name): ISearchOption {
 		$this->name = $name;
@@ -146,8 +121,6 @@ public function setName(string $name): ISearchOption {
 	 * Get the name/key of the option.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return string
 	 */
 	public function getName(): string {
 		return $this->name;
@@ -158,10 +131,6 @@ public function getName(): string {
 	 * Set the title/display name of the option.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $title
-	 *
-	 * @return ISearchOption
 	 */
 	public function setTitle(string $title): ISearchOption {
 		$this->title = $title;
@@ -173,8 +142,6 @@ public function setTitle(string $title): ISearchOption {
 	 * Get the title of the option.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return string
 	 */
 	public function getTitle(): string {
 		return $this->title;
@@ -186,10 +153,6 @@ public function getTitle(): string {
 	 * $type can be ISearchOption::CHECKBOX or ISearchOption::INPUT
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $type
-	 *
-	 * @return ISearchOption
 	 */
 	public function setType(string $type): ISearchOption {
 		$this->type = $type;
@@ -201,8 +164,6 @@ public function setType(string $type): ISearchOption {
 	 * Get the type of the option.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return string
 	 */
 	public function getType(): string {
 		return $this->type;
@@ -214,10 +175,6 @@ public function getType(): string {
 	 * Value can be ISearchOption::INPUT_SMALL or not defined.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $size
-	 *
-	 * @return ISearchOption
 	 */
 	public function setSize(string $size): ISearchOption {
 		$this->size = $size;
@@ -229,23 +186,16 @@ public function setSize(string $size): ISearchOption {
 	 * Get the size of the INPUT.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return string
 	 */
 	public function getSize(): string {
 		return $this->size;
 	}
 
-
 	/**
 	 * In case of Type is , set the placeholder to be displayed in the input
 	 * field.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $placeholder
-	 *
-	 * @return ISearchOption
 	 */
 	public function setPlaceholder(string $placeholder): ISearchOption {
 		$this->placeholder = $placeholder;
@@ -257,18 +207,13 @@ public function setPlaceholder(string $placeholder): ISearchOption {
 	 * Get the placeholder.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return string
 	 */
 	public function getPlaceholder(): string {
 		return $this->placeholder;
 	}
 
-
 	/**
 	 * @since 15.0.0
-	 *
-	 * @return array
 	 */
 	public function jsonSerialize(): array {
 		return [
diff --git a/lib/private/FullTextSearch/Model/SearchRequestSimpleQuery.php b/lib/private/FullTextSearch/Model/SearchRequestSimpleQuery.php
index c58d55b9b5531..25887cd90ac3d 100644
--- a/lib/private/FullTextSearch/Model/SearchRequestSimpleQuery.php
+++ b/lib/private/FullTextSearch/Model/SearchRequestSimpleQuery.php
@@ -37,34 +37,24 @@
  * @package OC\FullTextSearch\Model
  */
 final class SearchRequestSimpleQuery implements ISearchRequestSimpleQuery, JsonSerializable {
-	/** @var int */
-	private $type = 0;
-
-	/** @var string */
-	private $field = '';
-
-	/** @var array */
-	private $values = [];
+	private array $values = [];
 
 
 	/**
 	 * SearchRequestQuery constructor.
 	 *
-	 * @param $type
-	 * @param $field
-	 *
 	 * @since 17.0.0
 	 */
-	public function __construct(string $field, int $type) {
-		$this->field = $field;
-		$this->type = $type;
+	public function __construct(
+		private string $field,
+		private int $type,
+	) {
 	}
 
 
 	/**
 	 * Get the compare type of the query
 	 *
-	 * @return int
 	 * @since 17.0.0
 	 */
 	public function getType(): int {
@@ -75,7 +65,6 @@ public function getType(): int {
 	/**
 	 * Get the field to apply query
 	 *
-	 * @return string
 	 * @since 17.0.0
 	 */
 	public function getField(): string {
@@ -85,9 +74,6 @@ public function getField(): string {
 	/**
 	 * Set the field to apply query
 	 *
-	 * @param string $field
-	 *
-	 * @return ISearchRequestSimpleQuery
 	 * @since 17.0.0
 	 */
 	public function setField(string $field): ISearchRequestSimpleQuery {
@@ -100,7 +86,6 @@ public function setField(string $field): ISearchRequestSimpleQuery {
 	/**
 	 * Get the value to compare (string)
 	 *
-	 * @return array
 	 * @since 17.0.0
 	 */
 	public function getValues(): array {
@@ -111,9 +96,6 @@ public function getValues(): array {
 	/**
 	 * Add value to compare (string)
 	 *
-	 * @param string $value
-	 *
-	 * @return ISearchRequestSimpleQuery
 	 * @since 17.0.0
 	 */
 	public function addValue(string $value): ISearchRequestSimpleQuery {
@@ -125,9 +107,6 @@ public function addValue(string $value): ISearchRequestSimpleQuery {
 	/**
 	 * Add value to compare (int)
 	 *
-	 * @param int $value
-	 *
-	 * @return ISearchRequestSimpleQuery
 	 * @since 17.0.0
 	 */
 	public function addValueInt(int $value): ISearchRequestSimpleQuery {
@@ -139,9 +118,6 @@ public function addValueInt(int $value): ISearchRequestSimpleQuery {
 	/**
 	 * Add value to compare (array)
 	 *
-	 * @param array $value
-	 *
-	 * @return ISearchRequestSimpleQuery
 	 * @since 17.0.0
 	 */
 	public function addValueArray(array $value): ISearchRequestSimpleQuery {
@@ -153,9 +129,6 @@ public function addValueArray(array $value): ISearchRequestSimpleQuery {
 	/**
 	 * Add value to compare (bool)
 	 *
-	 * @param bool $value
-	 *
-	 * @return ISearchRequestSimpleQuery
 	 * @since 17.0.0
 	 */
 	public function addValueBool(bool $value): ISearchRequestSimpleQuery {
diff --git a/lib/private/FullTextSearch/Model/SearchTemplate.php b/lib/private/FullTextSearch/Model/SearchTemplate.php
index 4bb56f24b58a6..f1ecc0709e5ea 100644
--- a/lib/private/FullTextSearch/Model/SearchTemplate.php
+++ b/lib/private/FullTextSearch/Model/SearchTemplate.php
@@ -56,21 +56,13 @@
  * @package OC\FullTextSearch\Model
  */
 final class SearchTemplate implements ISearchTemplate, JsonSerializable {
-	/** @var string */
-	private $icon = '';
-
-	/** @var string */
-	private $css = '';
-
-	/** @var string */
-	private $template = '';
+	private string $template = '';
 
 	/** @var SearchOption[] */
-	private $panelOptions = [];
+	private array $panelOptions = [];
 
 	/** @var SearchOption[] */
-	private $navigationOptions = [];
-
+	private array $navigationOptions = [];
 
 	/**
 	 * ISearchTemplate constructor.
@@ -79,13 +71,11 @@ final class SearchTemplate implements ISearchTemplate, JsonSerializable {
 	 * creation of the object.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $icon
-	 * @param string $css
 	 */
-	public function __construct(string $icon = '', string $css = '') {
-		$this->icon = $icon;
-		$this->css = $css;
+	public function __construct(
+		private string $icon = '',
+		private string $css = '',
+	) {
 	}
 
 
@@ -94,10 +84,6 @@ public function __construct(string $icon = '', string $css = '') {
 	 * FullTextSearch navigation page, in front of the related Content Provider.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $class
-	 *
-	 * @return ISearchTemplate
 	 */
 	public function setIcon(string $class): ISearchTemplate {
 		$this->icon = $class;
@@ -107,10 +93,6 @@ public function setIcon(string $class): ISearchTemplate {
 
 	/**
 	 * Get the class of the icon.
-	 *
-	 * @since 15.0.0
-	 *
-	 * @return string
 	 */
 	public function getIcon(): string {
 		return $this->icon;
@@ -121,10 +103,6 @@ public function getIcon(): string {
 	 * Set the path of a CSS file that will be loaded when needed.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $css
-	 *
-	 * @return ISearchTemplate
 	 */
 	public function setCss(string $css): ISearchTemplate {
 		$this->css = $css;
@@ -136,8 +114,6 @@ public function setCss(string $css): ISearchTemplate {
 	 * Get the path of the CSS file.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return string
 	 */
 	public function getCss(): string {
 		return $this->css;
@@ -151,10 +127,6 @@ public function getCss(): string {
 	 * a way not generated by FullTextSearch
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param string $template
-	 *
-	 * @return ISearchTemplate
 	 */
 	public function setTemplate(string $template): ISearchTemplate {
 		$this->template = $template;
@@ -166,8 +138,6 @@ public function setTemplate(string $template): ISearchTemplate {
 	 * Get the path of the template file.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return string
 	 */
 	public function getTemplate(): string {
 		return $this->template;
@@ -181,10 +151,6 @@ public function getTemplate(): string {
 	 * @see ISearchOption
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param ISearchOption $option
-	 *
-	 * @return ISearchTemplate
 	 */
 	public function addPanelOption(ISearchOption $option): ISearchTemplate {
 		$this->panelOptions[] = $option;
@@ -210,10 +176,6 @@ public function getPanelOptions(): array {
 	 * @see ISearchOption
 	 *
 	 * @since 15.0.0
-	 *
-	 * @param ISearchOption $option
-	 *
-	 * @return ISearchTemplate
 	 */
 	public function addNavigationOption(ISearchOption $option): ISearchTemplate {
 		$this->navigationOptions[] = $option;
@@ -225,8 +187,6 @@ public function addNavigationOption(ISearchOption $option): ISearchTemplate {
 	 * Get all options to be displayed in the FullTextSearch navigation page.
 	 *
 	 * @since 15.0.0
-	 *
-	 * @return array
 	 */
 	public function getNavigationOptions(): array {
 		return $this->navigationOptions;
@@ -235,8 +195,6 @@ public function getNavigationOptions(): array {
 
 	/**
 	 * @since 15.0.0
-	 *
-	 * @return array
 	 */
 	public function jsonSerialize(): array {
 		return [
diff --git a/lib/public/FullTextSearch/Exceptions/FullTextSearchIndexNotAvailableException.php b/lib/public/FullTextSearch/Exceptions/FullTextSearchIndexNotAvailableException.php
new file mode 100644
index 0000000000000..cf3c59051359b
--- /dev/null
+++ b/lib/public/FullTextSearch/Exceptions/FullTextSearchIndexNotAvailableException.php
@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright 2023, Faraz Samapoor <f.samapoor@gmail.com>
+ *
+ * @author Faraz Samapoor <f.samapoor@gmail.com>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+namespace OCP\FullTextSearch\Exceptions;
+
+/**
+ * @since 28.0.0
+ *
+ * Class FullTextSearchIndexNotAvailableException
+ *
+ */
+class FullTextSearchIndexNotAvailableException extends \Exception {
+}