Add missing Javadocs

src/changes/changes.xml

@@ -27,6 +27,7 @@
     <action issue="COLLECTIONS-857" type="fix" dev="ggregory" due-to="Claude Warren">Complete bloom filter documentation #507.</action>
     <action type="fix" dev="ggregory" due-to="Gary Gregory">Package private AbstractEmptyIterator implements ResettableIterator so subclasses don't.</action>
     <action type="fix" dev="ggregory" due-to="Gary Gregory">Deprecate AbstractEmptyIterator.add(E) without replacement.</action>
+    <action type="fix" dev="ggregory" due-to="Gary Gregory">Add missing Javadocs.</action>
     <!-- ADD -->
     <!-- UPDATE -->
   </release>

src/main/java/org/apache/commons/collections4/iterators/AbstractEmptyIterator.java

@@ -35,41 +35,79 @@ protected AbstractEmptyIterator() {
 
     /**
      * Always throws UnsupportedOperationException.
-     * @param ignore ignore. 
-     * @throws UnsupportedOperationException
+     *
+     * @param ignored ignore. 
+     * @throws UnsupportedOperationException Always thrown.
      * @deprecated Will be removed in 5.0 without replacement.
      */
     @Deprecated
-    public void add(final E ignore) {
+    public void add(final E ignored) {
         throw new UnsupportedOperationException("add() not supported for empty Iterator");
     }
 
+    /**
+     * Always returns false, this iterator contains no elements.
+     *
+     * @return Always false.
+     */
     @Override
     public boolean hasNext() {
         return false;
     }
 
+    /**
+     * Always returns false, this iterator contains no elements.
+     *
+     * @return Always false.
+     */
     public boolean hasPrevious() {
         return false;
     }
 
+    /**
+     * Always throws IllegalStateException, this iterator contains no elements.
+     *
+     * @return Always throws IllegalStateException.
+     * @throws IllegalStateException Always thrown.
+     */
     @Override
     public E next() {
         throw new NoSuchElementException("Iterator contains no elements");
     }
 
+    /**
+     * Always returns 0, this iterator contains no elements.
+     *
+     * @return Always returns 0.
+     */
     public int nextIndex() {
         return 0;
     }
 
+    /**
+     * Always throws IllegalStateException, this iterator contains no elements.
+     *
+     * @return Always throws IllegalStateException.
+     * @throws IllegalStateException Always thrown.
+     */
     public E previous() {
         throw new NoSuchElementException("Iterator contains no elements");
     }
 
+    /**
+     * Always returns -1, this iterator contains no elements.
+     *
+     * @return Always returns -1.
+     */
     public int previousIndex() {
         return -1;
     }
 
+    /**
+     * Always throws IllegalStateException, this iterator contains no elements.
+     *
+     * @throws IllegalStateException Always thrown.
+     */
     @Override
     public void remove() {
         throw new IllegalStateException("Iterator contains no elements");
@@ -80,7 +118,13 @@ public void reset() {
         // do nothing
     }
 
-    public void set(final E obj) {
+    /**
+     * Always throws IllegalStateException, this iterator contains no elements.
+     *
+     * @param ignored ignored.
+     * @throws IllegalStateException Always thrown.
+     */
+    public void set(final E ignored) {
         throw new IllegalStateException("Iterator contains no elements");
     }