Javadoc: Add missing @param tags for generics.

src/main/java/org/apache/commons/collections4/ArrayStack.java

@@ -36,6 +36,7 @@ import java.util.EmptyStackException;
  * <b>Note:</b> From version 4.0 onwards, this class does not implement the
  * removed {@code Buffer} interface anymore.
  *
+ * @param <E> the type of elements in this list
  * @see java.util.Stack
  * @since 1.0
  * @deprecated use {@link java.util.ArrayDeque} instead (available from Java 1.6)

src/main/java/org/apache/commons/collections4/ListValuedMap.java

@@ -27,6 +27,8 @@ import java.util.List;
  *   <li>Getting a value will return a {@link List}, holding all the values put to that key.</li>
  * </ul>
  *
+ * @param <K> the type of the keys in this map
+ * @param <V> the type of the values in this map
  * @since 4.1
  */
 public interface ListValuedMap<K, V> extends MultiValuedMap<K, V> {

src/main/java/org/apache/commons/collections4/MultiValuedMap.java

@@ -42,6 +42,8 @@ import java.util.Set;
  * <code>coll</code> will be a collection containing "A", "B", "C".
  * <p>
  *
+ * @param <K> the type of the keys in this map
+ * @param <V> the type of the values in this map
  * @since 4.1
  */
 public interface MultiValuedMap<K, V> {

src/main/java/org/apache/commons/collections4/SetValuedMap.java

@@ -27,6 +27,8 @@ import java.util.Set;
  *   <li>Getting a value will return a {@link Set}, holding all the values put to that key.</li>
  * </ul>
  *
+ * @param <K> the type of the keys in this map
+ * @param <V> the type of the values in this map
  * @since 4.1
  */
 public interface SetValuedMap<K, V> extends MultiValuedMap<K, V> {

src/main/java/org/apache/commons/collections4/multimap/AbstractListValuedMap.java

@@ -32,6 +32,8 @@ import org.apache.commons.collections4.ListValuedMap;
  * Subclasses specify a Map implementation to use as the internal storage and
  * the List implementation to use as values.
  *
+ * @param <K> the type of the keys in this map
+ * @param <V> the type of the values in this map
  * @since 4.1
  */
 public abstract class AbstractListValuedMap<K, V> extends AbstractMultiValuedMap<K, V>

src/main/java/org/apache/commons/collections4/multimap/AbstractMultiValuedMap.java

@@ -51,6 +51,8 @@ import org.apache.commons.collections4.multiset.UnmodifiableMultiSet;
  * <p>
  * Subclasses specify a Map implementation to use as the internal storage.
  *
+ * @param <K> the type of the keys in this map
+ * @param <V> the type of the values in this map
  * @since 4.1
  */
 public abstract class AbstractMultiValuedMap<K, V> implements MultiValuedMap<K, V> {

src/main/java/org/apache/commons/collections4/multimap/AbstractSetValuedMap.java

@@ -30,6 +30,8 @@ import org.apache.commons.collections4.SetValuedMap;
  * Subclasses specify a Map implementation to use as the internal storage and
  * the Set implementation to use as values.
  *
+ * @param <K> the type of the keys in this map
+ * @param <V> the type of the values in this map
  * @since 4.1
  */
 public abstract class AbstractSetValuedMap<K, V> extends AbstractMultiValuedMap<K, V>

src/main/java/org/apache/commons/collections4/multimap/ArrayListValuedHashMap.java

@@ -37,6 +37,8 @@ import org.apache.commons.collections4.MultiValuedMap;
  * concurrently, you must use appropriate synchronization. This class may throw
  * exceptions when accessed by concurrent threads without synchronization.
  *
+ * @param <K> the type of the keys in this map
+ * @param <V> the type of the values in this map
  * @since 4.1
  */
 public class ArrayListValuedHashMap<K, V> extends AbstractListValuedMap<K, V>

src/main/java/org/apache/commons/collections4/multimap/HashSetValuedHashMap.java

@@ -36,6 +36,8 @@ import org.apache.commons.collections4.MultiValuedMap;
  * concurrently, you must use appropriate synchronization. This class may throw
  * exceptions when accessed by concurrent threads without synchronization.
  *
+ * @param <K> the type of the keys in this map
+ * @param <V> the type of the values in this map
  * @since 4.1
  */
 public class HashSetValuedHashMap<K, V> extends AbstractSetValuedMap<K, V>

src/main/java/org/apache/commons/collections4/multimap/TransformedMultiValuedMap.java

@@ -34,6 +34,8 @@ import org.apache.commons.collections4.Transformer;
  * <p>
  * <strong>Note that TransformedMultiValuedMap is not synchronized and is not thread-safe.</strong>
  *
+ * @param <K> the type of the keys in this map
+ * @param <V> the type of the values in this map
  * @since 4.1
  */
 public class TransformedMultiValuedMap<K, V> extends AbstractMultiValuedMapDecorator<K, V> {