diff --git a/src/jmh/java/net/sf/jabref/benchmarks/Benchmarks.java b/src/jmh/java/net/sf/jabref/benchmarks/Benchmarks.java
index 59bf3e6758d..2748fe43169 100644
--- a/src/jmh/java/net/sf/jabref/benchmarks/Benchmarks.java
+++ b/src/jmh/java/net/sf/jabref/benchmarks/Benchmarks.java
@@ -127,7 +127,7 @@ public boolean keywordGroupContains() throws ParseException {
     }
 
     @Benchmark
-    public boolean keywordGroupContainsWord() throws ParseException {
+    public boolean keywordGroupContainsWord() {
         return KeywordGroup.containsWord("testWord", "Some longer test string containing testWord the test word");
     }
 
diff --git a/src/main/java/net/sf/jabref/gui/help/HelpAction.java b/src/main/java/net/sf/jabref/gui/help/HelpAction.java
index 68e3f66e4ca..2e8854e723c 100644
--- a/src/main/java/net/sf/jabref/gui/help/HelpAction.java
+++ b/src/main/java/net/sf/jabref/gui/help/HelpAction.java
@@ -31,16 +31,12 @@
 import net.sf.jabref.logic.l10n.Localization;
 import net.sf.jabref.preferences.JabRefPreferences;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
-
 /**
  * This Action keeps a reference to a URL. When activated, it shows the help
  * Dialog unless it is already visible, and shows the URL in it.
  */
 public class HelpAction extends MnemonicAwareAction {
 
-    private static final Log LOGGER = LogFactory.getLog(HelpAction.class);
     private HelpFile helpPage;
 
 
diff --git a/src/main/java/net/sf/jabref/gui/openoffice/OOBibBase.java b/src/main/java/net/sf/jabref/gui/openoffice/OOBibBase.java
index c96a9ebdd66..3bed37b5f70 100644
--- a/src/main/java/net/sf/jabref/gui/openoffice/OOBibBase.java
+++ b/src/main/java/net/sf/jabref/gui/openoffice/OOBibBase.java
@@ -799,7 +799,7 @@ private List<String> getSortedReferenceMarks(final XNameAccess nameAccess)
     }
 
     public void rebuildBibTextSection(List<BibDatabase> databases, OOBibStyle style)
-            throws IOException, NoSuchElementException, WrappedTargetException, IllegalArgumentException,
+            throws NoSuchElementException, WrappedTargetException, IllegalArgumentException,
             CreationException, PropertyVetoException, UnknownPropertyException, UndefinedParagraphFormatException {
         List<String> cited = findCitedKeys();
         Map<String, BibDatabase> linkSourceBase = new HashMap<>();
diff --git a/src/main/java/net/sf/jabref/importer/fileformat/BibtexParser.java b/src/main/java/net/sf/jabref/importer/fileformat/BibtexParser.java
index 918212f4d56..172f89f50e5 100644
--- a/src/main/java/net/sf/jabref/importer/fileformat/BibtexParser.java
+++ b/src/main/java/net/sf/jabref/importer/fileformat/BibtexParser.java
@@ -242,7 +242,7 @@ private void parseAndAddEntry(String type) {
         }
     }
 
-    private void parseJabRefComment(Map<String, String> meta) throws IOException {
+    private void parseJabRefComment(Map<String, String> meta) {
         StringBuilder buffer = null;
         try {
             buffer = parseBracketedTextExactly();
diff --git a/src/main/java/net/sf/jabref/logic/groups/AllEntriesGroup.java b/src/main/java/net/sf/jabref/logic/groups/AllEntriesGroup.java
index aaf66b253e8..00e4173f249 100644
--- a/src/main/java/net/sf/jabref/logic/groups/AllEntriesGroup.java
+++ b/src/main/java/net/sf/jabref/logic/groups/AllEntriesGroup.java
@@ -18,7 +18,6 @@
 import java.util.List;
 import java.util.Optional;
 
-import net.sf.jabref.importer.fileformat.ParseException;
 import net.sf.jabref.logic.l10n.Localization;
 import net.sf.jabref.model.entry.BibEntry;
 
@@ -33,7 +32,7 @@ public AllEntriesGroup() {
         super(Localization.lang("All entries"), GroupHierarchyType.INDEPENDENT);
     }
 
-    public static AbstractGroup fromString(String s) throws ParseException {
+    public static AbstractGroup fromString(String s) {
         if (!s.startsWith(AllEntriesGroup.ID)) {
             throw new IllegalArgumentException("AllEntriesGroup cannot be created from \"" + s + "\".");
         }
diff --git a/src/main/java/net/sf/jabref/model/database/EntrySorter.java b/src/main/java/net/sf/jabref/model/database/EntrySorter.java
index 1d078cd79f8..e71d9fc9c0e 100644
--- a/src/main/java/net/sf/jabref/model/database/EntrySorter.java
+++ b/src/main/java/net/sf/jabref/model/database/EntrySorter.java
@@ -22,13 +22,8 @@
 
 import net.sf.jabref.model.entry.BibEntry;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
-
 public class EntrySorter {
 
-    private static final Log LOGGER = LogFactory.getLog(EntrySorter.class);
-
     // guarded by itself
     private final List<BibEntry> entries;
 
diff --git a/src/test/java/net/sf/jabref/importer/fileformat/PdfContentImporterTest.java b/src/test/java/net/sf/jabref/importer/fileformat/PdfContentImporterTest.java
index 6c39de1e9eb..97bd858ac5c 100644
--- a/src/test/java/net/sf/jabref/importer/fileformat/PdfContentImporterTest.java
+++ b/src/test/java/net/sf/jabref/importer/fileformat/PdfContentImporterTest.java
@@ -1,6 +1,5 @@
 package net.sf.jabref.importer.fileformat;
 
-import java.io.IOException;
 import java.net.URISyntaxException;
 import java.nio.charset.Charset;
 import java.nio.file.Path;
@@ -30,8 +29,7 @@ public void testGetDescription() {
     }
 
     @Test
-    public void doesNotHandleEncryptedPdfs() throws IOException, URISyntaxException {
-        PdfContentImporter importer = new PdfContentImporter();
+    public void doesNotHandleEncryptedPdfs() throws URISyntaxException {
         Path file = Paths.get(PdfContentImporter.class.getResource("/pdfs/encrypted.pdf").toURI());
         List<BibEntry> result = importer.importDatabase(file, Charset.defaultCharset()).getDatabase().getEntries();
         assertEquals(Collections.emptyList(), result);
diff --git a/src/test/java/net/sf/jabref/importer/fileformat/PdfXmpImporterTest.java b/src/test/java/net/sf/jabref/importer/fileformat/PdfXmpImporterTest.java
index ab6147538e2..6d79b29ef8f 100644
--- a/src/test/java/net/sf/jabref/importer/fileformat/PdfXmpImporterTest.java
+++ b/src/test/java/net/sf/jabref/importer/fileformat/PdfXmpImporterTest.java
@@ -49,14 +49,14 @@ public void testGetDescription() {
     }
 
     @Test
-    public void importEncryptedFileReturnsError() throws IOException, URISyntaxException {
+    public void importEncryptedFileReturnsError() throws URISyntaxException {
         Path file = Paths.get(PdfXmpImporterTest.class.getResource("/pdfs/encrypted.pdf").toURI());
         ParserResult result = importer.importDatabase(file, Charset.defaultCharset());
         Assert.assertTrue(result.hasWarnings());
     }
 
     @Test
-    public void testImportEntries() throws IOException, URISyntaxException {
+    public void testImportEntries() throws URISyntaxException {
         Path file = Paths.get(PdfXmpImporterTest.class.getResource("annotated.pdf").toURI());
         List<BibEntry> bibEntries = importer.importDatabase(file, Charset.defaultCharset()).getDatabase().getEntries();