diff --git a/src/main/java/org/apache/commons/collections4/OrderedIterator.java b/src/main/java/org/apache/commons/collections4/OrderedIterator.java
index 978251501..5a13bd449 100644
--- a/src/main/java/org/apache/commons/collections4/OrderedIterator.java
+++ b/src/main/java/org/apache/commons/collections4/OrderedIterator.java
@@ -24,7 +24,7 @@ import java.util.Iterator;
  * This iterator allows both forward and reverse iteration through the container.
  * </p>
  *
- * @param <E> the type of elements returned by this iterator
+ * @param <E> the type of elements returned by this iterator.
  * @since 3.0
  */
 public interface OrderedIterator<E> extends Iterator<E> {
diff --git a/src/main/java/org/apache/commons/collections4/ResettableIterator.java b/src/main/java/org/apache/commons/collections4/ResettableIterator.java
index 91d17621b..91c2b2e78 100644
--- a/src/main/java/org/apache/commons/collections4/ResettableIterator.java
+++ b/src/main/java/org/apache/commons/collections4/ResettableIterator.java
@@ -24,7 +24,7 @@ import java.util.Iterator;
  * This interface allows an iterator to be repeatedly reused.
  * </p>
  *
- * @param <E> the type of elements returned by this iterator
+ * @param <E> the type of elements returned by this iterator.
  * @since 3.0
  */
 public interface ResettableIterator<E> extends Iterator<E> {
diff --git a/src/main/java/org/apache/commons/collections4/ResettableListIterator.java b/src/main/java/org/apache/commons/collections4/ResettableListIterator.java
index cec204852..b3f64075d 100644
--- a/src/main/java/org/apache/commons/collections4/ResettableListIterator.java
+++ b/src/main/java/org/apache/commons/collections4/ResettableListIterator.java
@@ -24,9 +24,9 @@ import java.util.ListIterator;
  * This interface allows an iterator to be repeatedly reused.
  * </p>
  *
- * @param <E> the type of elements returned by this iterator
+ * @param <E> the type of elements returned by this iterator.
  * @since 3.0
  */
 public interface ResettableListIterator<E> extends ListIterator<E>, ResettableIterator<E>, OrderedIterator<E> {
-
+    // empty
 }
diff --git a/src/main/java/org/apache/commons/collections4/iterators/ArrayIterator.java b/src/main/java/org/apache/commons/collections4/iterators/ArrayIterator.java
index f3d3599a4..84ee3039c 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/ArrayIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/ArrayIterator.java
@@ -32,7 +32,7 @@ import org.apache.commons.collections4.ResettableIterator;
  * The iterator implements a {@link #reset} method, allowing the reset of
  * the iterator back to the start if required.
  *
- * @param <E> the type of elements returned by this iterator
+ * @param <E> the type of elements returned by this iterator.
  * @since 1.0
  */
 public class ArrayIterator<E> implements ResettableIterator<E> {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/ArrayListIterator.java b/src/main/java/org/apache/commons/collections4/iterators/ArrayListIterator.java
index d01597c9f..08452b71b 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/ArrayListIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/ArrayListIterator.java
@@ -32,6 +32,7 @@ import org.apache.commons.collections4.ResettableListIterator;
  * This iterator does not support {@link #add(Object)} or {@link #remove()}, as the array
  * cannot be changed in size. The {@link #set(Object)} method is supported however.
  *
+ * @param <E> the type of elements returned by this iterator.
  * @see org.apache.commons.collections4.iterators.ArrayIterator
  * @see java.util.Iterator
  * @see java.util.ListIterator
diff --git a/src/main/java/org/apache/commons/collections4/iterators/BoundedIterator.java b/src/main/java/org/apache/commons/collections4/iterators/BoundedIterator.java
index b8aa08c93..266b28c8d 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/BoundedIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/BoundedIterator.java
@@ -29,6 +29,7 @@ import java.util.Objects;
  * iterator is immediately advanced to this position, skipping all elements
  * before that position.
  *
+ * @param <E> the type of elements returned by this iterator.
  * @since 4.1
  */
 public class BoundedIterator<E> implements Iterator<E> {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/CollatingIterator.java b/src/main/java/org/apache/commons/collections4/iterators/CollatingIterator.java
index a1ae4c14f..e02ffe767 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/CollatingIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/CollatingIterator.java
@@ -36,6 +36,7 @@ import org.apache.commons.collections4.list.UnmodifiableList;
  * {@code B}, the {@link #next} method on this iterator will return the
  * lesser of {@code A.next()} and {@code B.next()}.
  *
+ * @param <E> the type of elements returned by this iterator.
  * @since 2.1
  */
 public class CollatingIterator<E> implements Iterator<E> {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/EmptyIterator.java b/src/main/java/org/apache/commons/collections4/iterators/EmptyIterator.java
index 2bcf193d8..76b2b04b5 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/EmptyIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/EmptyIterator.java
@@ -27,6 +27,7 @@ import org.apache.commons.collections4.ResettableIterator;
  * This class provides for binary compatibility between Commons Collections
  * 2.1.1 and 3.1 due to issues with {@code IteratorUtils}.
  *
+ * @param <E> the type of elements returned by this iterator.
  * @since 2.1.1 and 3.1
  */
 public class EmptyIterator<E> extends AbstractEmptyIterator<E> implements ResettableIterator<E> {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/EmptyListIterator.java b/src/main/java/org/apache/commons/collections4/iterators/EmptyListIterator.java
index 0b9f6724e..0bd1c27e5 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/EmptyListIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/EmptyListIterator.java
@@ -27,6 +27,7 @@ import org.apache.commons.collections4.ResettableListIterator;
  * provides for binary compatibility between Commons Collections 2.1.1 and 3.1
  * due to issues with {@code IteratorUtils}.
  *
+ * @param <E> the type of elements returned by this iterator.
  * @since 2.1.1 and 3.1
  */
 public class EmptyListIterator<E> extends AbstractEmptyIterator<E> implements
diff --git a/src/main/java/org/apache/commons/collections4/iterators/EmptyOrderedIterator.java b/src/main/java/org/apache/commons/collections4/iterators/EmptyOrderedIterator.java
index 113d223af..1923ee499 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/EmptyOrderedIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/EmptyOrderedIterator.java
@@ -22,7 +22,7 @@ import org.apache.commons.collections4.ResettableIterator;
 /**
  * Provides an implementation of an empty ordered iterator.
  *
- * @param <E> the type to iterate.
+ * @param <E> the type of elements returned by this iterator.
  * @since 3.1
  */
 public class EmptyOrderedIterator<E> extends AbstractEmptyIterator<E>
diff --git a/src/main/java/org/apache/commons/collections4/iterators/EnumerationIterator.java b/src/main/java/org/apache/commons/collections4/iterators/EnumerationIterator.java
index 518ffdda6..8e08a2f50 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/EnumerationIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/EnumerationIterator.java
@@ -24,6 +24,7 @@ import java.util.Iterator;
  * Adapter to make {@link Enumeration Enumeration} instances appear
  * to be {@link Iterator Iterator} instances.
  *
+ * @param <E> the type of elements returned by this iterator.
  * @since 1.0
  */
 public class EnumerationIterator<E> implements Iterator<E> {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/FilterIterator.java b/src/main/java/org/apache/commons/collections4/iterators/FilterIterator.java
index 3da4b71f5..20d98610d 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/FilterIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/FilterIterator.java
@@ -27,6 +27,7 @@ import org.apache.commons.collections4.Predicate;
  * This iterator decorates the underlying iterator, only allowing through
  * those elements that match the specified {@link Predicate Predicate}.
  *
+ * @param <E> the type of elements returned by this iterator.
  * @since 1.0
  */
 public class FilterIterator<E> implements Iterator<E> {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/FilterListIterator.java b/src/main/java/org/apache/commons/collections4/iterators/FilterListIterator.java
index 8e4f83b24..958a5d789 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/FilterListIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/FilterListIterator.java
@@ -27,6 +27,7 @@ import org.apache.commons.collections4.Predicate;
  * This iterator decorates the underlying iterator, only allowing through
  * those elements that match the specified {@link Predicate Predicate}.
  *
+ * @param <E> the type of elements returned by this iterator.
  * @since 2.0
  */
 public class FilterListIterator<E> implements ListIterator<E> {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/IteratorEnumeration.java b/src/main/java/org/apache/commons/collections4/iterators/IteratorEnumeration.java
index 289ebf55b..23c9c799f 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/IteratorEnumeration.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/IteratorEnumeration.java
@@ -23,6 +23,7 @@ import java.util.Iterator;
  * Adapter to make an {@link Iterator Iterator} instance appear to be an
  * {@link Enumeration Enumeration} instance.
  *
+ * @param <E> the type of elements returned by this iterator.
  * @since 1.0
  */
 public class IteratorEnumeration<E> implements Enumeration<E> {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/IteratorIterable.java b/src/main/java/org/apache/commons/collections4/iterators/IteratorIterable.java
index 86b7bd187..f193d83f1 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/IteratorIterable.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/IteratorIterable.java
@@ -60,6 +60,7 @@ import org.apache.commons.collections4.ResettableIterator;
  *   Iterable&lt;Integer&gt; iterable = new IteratorIterable&lt;Integer&gt;(iterator, true);
  * </pre>
  *
+ * @param <E> the type of elements returned by this iterator.
  * @since 4.0
  */
 public class IteratorIterable<E> implements Iterable<E> {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/LoopingIterator.java b/src/main/java/org/apache/commons/collections4/iterators/LoopingIterator.java
index a3cbb4f88..4c2614b58 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/LoopingIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/LoopingIterator.java
@@ -33,6 +33,7 @@ import org.apache.commons.collections4.ResettableIterator;
  * Concurrent modifications are not directly supported, and for most collection
  * implementations will throw a ConcurrentModificationException.
  *
+ * @param <E> the type of elements returned by this iterator.
  * @since 3.0
  */
 public class LoopingIterator<E> implements ResettableIterator<E> {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/LoopingListIterator.java b/src/main/java/org/apache/commons/collections4/iterators/LoopingListIterator.java
index 50b5c6a97..0f1fc3dd1 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/LoopingListIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/LoopingListIterator.java
@@ -35,6 +35,7 @@ import org.apache.commons.collections4.ResettableListIterator;
  * collection implementations will throw a
  * ConcurrentModificationException.
  *
+ * @param <E> the type of elements returned by this iterator.
  * @since 3.2
  */
 public class LoopingListIterator<E> implements ResettableListIterator<E> {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/ObjectArrayIterator.java b/src/main/java/org/apache/commons/collections4/iterators/ObjectArrayIterator.java
index 7d6883e9a..da6c86437 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/ObjectArrayIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/ObjectArrayIterator.java
@@ -29,7 +29,7 @@ import org.apache.commons.collections4.ResettableIterator;
  * The iterator implements a {@link #reset} method, allowing the reset of the iterator
  * back to the start if required.
  *
- * @param <E> the type of elements returned by this iterator
+ * @param <E> the type of elements returned by this iterator.
  * @since 3.0
  */
 public class ObjectArrayIterator<E> implements ResettableIterator<E> {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/ObjectArrayListIterator.java b/src/main/java/org/apache/commons/collections4/iterators/ObjectArrayListIterator.java
index 758f1e222..ae9e1d081 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/ObjectArrayListIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/ObjectArrayListIterator.java
@@ -29,6 +29,7 @@ import org.apache.commons.collections4.ResettableListIterator;
  * The iterator implements a {@link #reset} method, allowing the reset of the iterator
  * back to the start if required.
  *
+ * @param <E> the type of elements returned by this iterator.
  * @see org.apache.commons.collections4.iterators.ObjectArrayIterator
  * @see java.util.Iterator
  * @see java.util.ListIterator
diff --git a/src/main/java/org/apache/commons/collections4/iterators/ObjectGraphIterator.java b/src/main/java/org/apache/commons/collections4/iterators/ObjectGraphIterator.java
index 0eb97a095..4ae0c878c 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/ObjectGraphIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/ObjectGraphIterator.java
@@ -71,6 +71,7 @@ import org.apache.commons.collections4.Transformer;
  * Under many circumstances, linking Iterators together in this manner is
  * more efficient (and convenient) than using nested for loops to extract a list.
  *
+ * @param <E> the type of elements returned by this iterator.
  * @since 3.1
  */
 public class ObjectGraphIterator<E> implements Iterator<E> {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/PeekingIterator.java b/src/main/java/org/apache/commons/collections4/iterators/PeekingIterator.java
index f795fbe31..d28060bf6 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/PeekingIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/PeekingIterator.java
@@ -28,6 +28,7 @@ import java.util.Objects;
  * will be thrown if {@link #remove()} is called directly after a call to
  * {@link #peek()} or {@link #element()}.
  *
+ * @param <E> the type of elements returned by this iterator.
  * @since 4.0
  */
 public class PeekingIterator<E> implements Iterator<E> {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/PushbackIterator.java b/src/main/java/org/apache/commons/collections4/iterators/PushbackIterator.java
index 3f79721aa..a52935447 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/PushbackIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/PushbackIterator.java
@@ -31,6 +31,7 @@ import java.util.Objects;
  * The decorator does not support the removal operation. Any call to {@link #remove()} will
  * result in an {@link UnsupportedOperationException}.
  *
+ * @param <E> the type of elements returned by this iterator.
  * @since 4.0
  */
 public class PushbackIterator<E> implements Iterator<E> {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/ReverseListIterator.java b/src/main/java/org/apache/commons/collections4/iterators/ReverseListIterator.java
index ff4c2d873..3e45aa8c5 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/ReverseListIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/ReverseListIterator.java
@@ -34,6 +34,7 @@ import org.apache.commons.collections4.ResettableListIterator;
  * index in the list, thus it starts high and reduces as the iteration
  * continues. The previous methods work similarly.
  *
+ * @param <E> the type of elements returned by this iterator.
  * @since 3.2
  */
 public class ReverseListIterator<E> implements ResettableListIterator<E> {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/SingletonIterator.java b/src/main/java/org/apache/commons/collections4/iterators/SingletonIterator.java
index 6ccec888f..95b018f9a 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/SingletonIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/SingletonIterator.java
@@ -24,6 +24,7 @@ import org.apache.commons.collections4.ResettableIterator;
  * {@code SingletonIterator} is an {@link java.util.Iterator} over a single
  * object instance.
  *
+ * @param <E> the type of elements returned by this iterator.
  * @since 2.0
  */
 public class SingletonIterator<E>
diff --git a/src/main/java/org/apache/commons/collections4/iterators/SingletonListIterator.java b/src/main/java/org/apache/commons/collections4/iterators/SingletonListIterator.java
index 312f393f8..5f4ea6027 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/SingletonListIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/SingletonListIterator.java
@@ -24,6 +24,7 @@ import org.apache.commons.collections4.ResettableListIterator;
  * {@code SingletonIterator} is an {@link java.util.ListIterator} over a single
  * object instance.
  *
+ * @param <E> the type of elements returned by this iterator.
  * @since 2.1
  */
 public class SingletonListIterator<E> implements ResettableListIterator<E> {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/SkippingIterator.java b/src/main/java/org/apache/commons/collections4/iterators/SkippingIterator.java
index 5be06cfad..f86559b2f 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/SkippingIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/SkippingIterator.java
@@ -23,6 +23,7 @@ import java.util.Iterator;
  * before that position.
  * </p>
  *
+ * @param <E> the type of elements returned by this iterator.
  * @since 4.1
  */
 public class SkippingIterator<E> extends AbstractIteratorDecorator<E> {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/UniqueFilterIterator.java b/src/main/java/org/apache/commons/collections4/iterators/UniqueFilterIterator.java
index 80b01de72..059bbec85 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/UniqueFilterIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/UniqueFilterIterator.java
@@ -25,6 +25,7 @@ import org.apache.commons.collections4.functors.UniquePredicate;
  * the Iterator maintains a Set of objects it has already encountered,
  * and duplicate Objects are skipped.
  *
+ * @param <E> the type of elements returned by this iterator.
  * @since 2.1
  */
 public class UniqueFilterIterator<E> extends FilterIterator<E> {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/UnmodifiableIterator.java b/src/main/java/org/apache/commons/collections4/iterators/UnmodifiableIterator.java
index 0992cb850..13b80525d 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/UnmodifiableIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/UnmodifiableIterator.java
@@ -27,6 +27,7 @@ import org.apache.commons.collections4.Unmodifiable;
  * Attempts to modify it will result in an UnsupportedOperationException.
  * </p>
  *
+ * @param <E> the type of elements returned by this iterator.
  * @since 3.0
  */
 public final class UnmodifiableIterator<E> implements Iterator<E>, Unmodifiable {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/UnmodifiableListIterator.java b/src/main/java/org/apache/commons/collections4/iterators/UnmodifiableListIterator.java
index 3178d5ed0..a325b3440 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/UnmodifiableListIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/UnmodifiableListIterator.java
@@ -27,6 +27,7 @@ import org.apache.commons.collections4.Unmodifiable;
  * Attempts to modify it will result in an UnsupportedOperationException.
  * </p>
  *
+ * @param <E> the type of elements returned by this iterator.
  * @since 3.0
  */
 public final class UnmodifiableListIterator<E> implements ListIterator<E>, Unmodifiable {
diff --git a/src/main/java/org/apache/commons/collections4/iterators/ZippingIterator.java b/src/main/java/org/apache/commons/collections4/iterators/ZippingIterator.java
index 5e6ba8de6..0844385ab 100644
--- a/src/main/java/org/apache/commons/collections4/iterators/ZippingIterator.java
+++ b/src/main/java/org/apache/commons/collections4/iterators/ZippingIterator.java
@@ -33,6 +33,7 @@ import org.apache.commons.collections4.FluentIterable;
  * and {@code B.next()} until both iterators are exhausted.
  * </p>
  *
+ * @param <E> the type of elements returned by this iterator.
  * @since 4.1
  */
 public class ZippingIterator<E> implements Iterator<E> {