diff --git a/gcloud-java-storage/src/main/java/com/google/gcloud/storage/Blob.java b/gcloud-java-storage/src/main/java/com/google/gcloud/storage/Blob.java
index d52b15eae8c2..ebad11150663 100644
--- a/gcloud-java-storage/src/main/java/com/google/gcloud/storage/Blob.java
+++ b/gcloud-java-storage/src/main/java/com/google/gcloud/storage/Blob.java
@@ -109,13 +109,11 @@ public Blob(Storage storage, BlobInfo info) {
    */
   public Blob(Storage storage, String bucket, String blob) {
     this.storage = checkNotNull(storage);
-    this.info = BlobInfo.of(bucket, blob);
+    this.info = BlobInfo.of(checkNotNull(bucket), checkNotNull(blob));
   }
 
   /**
-   * Get the blobs's information.
-   * 
-   * @return a {@code BlobInfo} object for this blob
+   * Return the blob's information.
    */
   public BlobInfo info() {
     return info;
@@ -135,7 +133,6 @@ public boolean exists() {
    * Return this blob's content.
    *
    * @param options blob read options
-   * @return the blob's content
    * @throws StorageException upon failure
    */
   public byte[] content(Storage.BlobSourceOption... options) {
@@ -199,10 +196,9 @@ public Blob copyTo(BlobInfo target, Iterable<BlobSourceOption> sourceOptions,
   }
 
   /**
-   * Return a channel for reading this blob's content.
+   * Return a {@code BlobReadChannel} object for reading this blob's content.
    *
    * @param options blob read options
-   * @return a {@code BlobReadChannel} object to read this blob
    * @throws StorageException upon failure
    */
   public BlobReadChannel reader(BlobSourceOption... options) {
@@ -210,10 +206,9 @@ public BlobReadChannel reader(BlobSourceOption... options) {
   }
 
   /**
-   * Return a channel for writing to this blob.
+   * Return a {@code BlobWriteChannel} object for writing to this blob.
    *
    * @param options target blob options
-   * @return a {@code BlobWriteChannel} object for writing to this blob
    * @throws StorageException upon failure
    */
   public BlobWriteChannel writer(BlobTargetOption... options) {
@@ -236,9 +231,7 @@ public URL signUrl(long expirationTimeInSeconds, SignUrlOption... options) {
   }
 
   /**
-   * Get this blobs's {@code Storage} object.
-   * 
-   * @return the storage service used by this blob to issue requests
+   * Return the blob's {@code Storage} object used to issue requests.
    */
   public Storage storage() {
     return storage;
diff --git a/gcloud-java-storage/src/main/java/com/google/gcloud/storage/Bucket.java b/gcloud-java-storage/src/main/java/com/google/gcloud/storage/Bucket.java
index 56d27c3c621f..77c16c106e57 100644
--- a/gcloud-java-storage/src/main/java/com/google/gcloud/storage/Bucket.java
+++ b/gcloud-java-storage/src/main/java/com/google/gcloud/storage/Bucket.java
@@ -57,13 +57,11 @@ public Bucket(Storage storage, BucketInfo info) {
    */
   public Bucket(Storage storage, String bucket) {
     this.storage = checkNotNull(storage);
-    this.info = BucketInfo.of(bucket);
+    this.info = BucketInfo.of(checkNotNull(bucket));
   }
 
   /**
-   * Get the bucket's information.
-   * 
-   * @return a {@code BucketInfo} object for this bucket
+   * Return the bucket's information.
    */
   public BucketInfo info() {
     return info;
@@ -103,10 +101,9 @@ public boolean delete(BucketSourceOption... options) {
   }
 
   /**
-   * List blobs in this bucket.
+   * Return the paginated list of {@code Blob} in this bucket.
    * 
    * @param options options for listing blobs
-   * @return the paginated list of {@code Blob} objects in this bucket
    * @throws StorageException upon failure
    */
   public ListResult<Blob> list(Storage.BlobListOption... options) {
@@ -118,7 +115,6 @@ public ListResult<Blob> list(Storage.BlobListOption... options) {
    * 
    * @param blob name of the requested blob
    * @param options blob search options
-   * @return the requested blob in this bucket or {@code null} if not found
    * @throws StorageException upon failure
    */
   public Blob get(String blob, BlobSourceOption... options) {
@@ -129,7 +125,6 @@ public Blob get(String blob, BlobSourceOption... options) {
    * Return a list of requested blobs in this bucket. Blobs that do not exist are null.
    * 
    * @param blobNames names of the requested blobs
-   * @return a list containing the requested blobs in this bucket
    * @throws StorageException upon failure
    */
   public List<Blob> getAll(String... blobNames) {
@@ -161,9 +156,7 @@ Blob create(String blob, byte[] content, BlobTargetOption... options) {
   }
 
   /**
-   * Get this bucket's {@code Storage} object.
-   * 
-   * @return the storage service used by this bucket to issue requests
+   * Return the bucket's {@code Storage} object used to issue requests.
    */
   public Storage storage() {
     return storage;