diff --git a/src/main/java/org/apache/commons/collections4/Bag.java b/src/main/java/org/apache/commons/collections4/Bag.java
index 96c194309..c6d9781bb 100644
--- a/src/main/java/org/apache/commons/collections4/Bag.java
+++ b/src/main/java/org/apache/commons/collections4/Bag.java
@@ -38,7 +38,7 @@ import java.util.Set;
  * In an ideal world, the interface would be changed to fix the problems, however
  * it has been decided to maintain backwards compatibility instead.
  *
- * @param <E> the type held in the bag
+ * @param <E> the type of elements in this bag
  * @since 2.0
  */
 public interface Bag<E> extends Collection<E> {
diff --git a/src/main/java/org/apache/commons/collections4/SortedBag.java b/src/main/java/org/apache/commons/collections4/SortedBag.java
index 15c5feb20..24324b0f5 100644
--- a/src/main/java/org/apache/commons/collections4/SortedBag.java
+++ b/src/main/java/org/apache/commons/collections4/SortedBag.java
@@ -22,7 +22,7 @@ import java.util.Comparator;
  * Defines a type of <code>Bag</code> that maintains a sorted order among
  * its unique representative members.
  *
- * @param <E> the type to iterate over
+ * @param <E> the type of elements in this bag
  * @since 2.0
  */
 public interface SortedBag<E> extends Bag<E> {
diff --git a/src/main/java/org/apache/commons/collections4/bag/AbstractBagDecorator.java b/src/main/java/org/apache/commons/collections4/bag/AbstractBagDecorator.java
index 3c952afb9..99e4d6dad 100644
--- a/src/main/java/org/apache/commons/collections4/bag/AbstractBagDecorator.java
+++ b/src/main/java/org/apache/commons/collections4/bag/AbstractBagDecorator.java
@@ -26,6 +26,7 @@ import org.apache.commons.collections4.collection.AbstractCollectionDecorator;
  * <p>
  * Methods are forwarded directly to the decorated bag.
  *
+ * @param <E> the type of elements in this bag
  * @since 3.0
  */
 public abstract class AbstractBagDecorator<E>
diff --git a/src/main/java/org/apache/commons/collections4/bag/AbstractMapBag.java b/src/main/java/org/apache/commons/collections4/bag/AbstractMapBag.java
index 0d01270c4..8b7152e95 100644
--- a/src/main/java/org/apache/commons/collections4/bag/AbstractMapBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/AbstractMapBag.java
@@ -38,6 +38,7 @@ import org.apache.commons.collections4.set.UnmodifiableSet;
  * map will be used to map bag elements to a number; the number represents the
  * number of occurrences of that element in the bag.
  *
+ * @param <E> the type of elements in this bag
  * @since 3.0 (previously DefaultMapBag v2.0)
  */
 public abstract class AbstractMapBag<E> implements Bag<E> {
diff --git a/src/main/java/org/apache/commons/collections4/bag/AbstractSortedBagDecorator.java b/src/main/java/org/apache/commons/collections4/bag/AbstractSortedBagDecorator.java
index 187fc9574..99424fb1f 100644
--- a/src/main/java/org/apache/commons/collections4/bag/AbstractSortedBagDecorator.java
+++ b/src/main/java/org/apache/commons/collections4/bag/AbstractSortedBagDecorator.java
@@ -25,6 +25,7 @@ import org.apache.commons.collections4.SortedBag;
  * <p>
  * Methods are forwarded directly to the decorated bag.
  *
+ * @param <E> the type of elements in this bag
  * @since 3.0
  */
 public abstract class AbstractSortedBagDecorator<E>
diff --git a/src/main/java/org/apache/commons/collections4/bag/CollectionBag.java b/src/main/java/org/apache/commons/collections4/bag/CollectionBag.java
index 7fbe3460f..c27d0090d 100644
--- a/src/main/java/org/apache/commons/collections4/bag/CollectionBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/CollectionBag.java
@@ -34,7 +34,7 @@ import org.apache.commons.collections4.Bag;
  * The method javadoc highlights the differences compared to the original Bag interface.
  *
  * @see Bag
- * @param <E> the type held in the bag
+ * @param <E> the type of elements in this bag
  * @since 4.0
  */
 public final class CollectionBag<E> extends AbstractBagDecorator<E> {
diff --git a/src/main/java/org/apache/commons/collections4/bag/CollectionSortedBag.java b/src/main/java/org/apache/commons/collections4/bag/CollectionSortedBag.java
index 88a4c76da..ef433e5f6 100644
--- a/src/main/java/org/apache/commons/collections4/bag/CollectionSortedBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/CollectionSortedBag.java
@@ -27,6 +27,7 @@ import org.apache.commons.collections4.SortedBag;
 /**
  * Decorates another {@link SortedBag} to comply with the Collection contract.
  *
+ * @param <E> the type of elements in this bag
  * @since 4.0
  */
 public final class CollectionSortedBag<E> extends AbstractSortedBagDecorator<E> {
diff --git a/src/main/java/org/apache/commons/collections4/bag/HashBag.java b/src/main/java/org/apache/commons/collections4/bag/HashBag.java
index 9fca8421f..33adb1f66 100644
--- a/src/main/java/org/apache/commons/collections4/bag/HashBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/HashBag.java
@@ -33,6 +33,7 @@ import java.util.HashMap;
  * interface javadoc carefully as several methods violate the
  * {@link Collection} interface specification.
  *
+ * @param <E> the type of elements in this bag
  * @since 3.0 (previously in main package v2.0)
  */
 public class HashBag<E> extends AbstractMapBag<E> implements Serializable {
diff --git a/src/main/java/org/apache/commons/collections4/bag/PredicatedBag.java b/src/main/java/org/apache/commons/collections4/bag/PredicatedBag.java
index c79715aaf..bc69ad4fc 100644
--- a/src/main/java/org/apache/commons/collections4/bag/PredicatedBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/PredicatedBag.java
@@ -37,6 +37,7 @@ import org.apache.commons.collections4.collection.PredicatedCollection;
  * <p>
  * This class is Serializable from Commons Collections 3.1.
  *
+ * @param <E> the type of elements in this bag
  * @since 3.0
  */
 public class PredicatedBag<E> extends PredicatedCollection<E> implements Bag<E> {
diff --git a/src/main/java/org/apache/commons/collections4/bag/PredicatedSortedBag.java b/src/main/java/org/apache/commons/collections4/bag/PredicatedSortedBag.java
index 6524ee578..124d49ca2 100644
--- a/src/main/java/org/apache/commons/collections4/bag/PredicatedSortedBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/PredicatedSortedBag.java
@@ -36,6 +36,7 @@ import org.apache.commons.collections4.SortedBag;
  * <p>
  * This class is Serializable from Commons Collections 3.1.
  *
+ * @param <E> the type of elements in this bag
  * @since 3.0
  */
 public class PredicatedSortedBag<E> extends PredicatedBag<E> implements SortedBag<E> {
diff --git a/src/main/java/org/apache/commons/collections4/bag/SynchronizedBag.java b/src/main/java/org/apache/commons/collections4/bag/SynchronizedBag.java
index 6e2009b5b..362245f8e 100644
--- a/src/main/java/org/apache/commons/collections4/bag/SynchronizedBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/SynchronizedBag.java
@@ -30,6 +30,7 @@ import org.apache.commons.collections4.collection.SynchronizedCollection;
  * <p>
  * This class is Serializable from Commons Collections 3.1.
  *
+ * @param <E> the type of elements in this bag
  * @since 3.0
  */
 public class SynchronizedBag<E> extends SynchronizedCollection<E> implements Bag<E> {
diff --git a/src/main/java/org/apache/commons/collections4/bag/SynchronizedSortedBag.java b/src/main/java/org/apache/commons/collections4/bag/SynchronizedSortedBag.java
index 6d14ce1bc..6dae8d456 100644
--- a/src/main/java/org/apache/commons/collections4/bag/SynchronizedSortedBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/SynchronizedSortedBag.java
@@ -30,6 +30,7 @@ import org.apache.commons.collections4.SortedBag;
  * <p>
  * This class is Serializable from Commons Collections 3.1.
  *
+ * @param <E> the type of elements in this bag
  * @since 3.0
  */
 public class SynchronizedSortedBag<E> extends SynchronizedBag<E> implements SortedBag<E> {
diff --git a/src/main/java/org/apache/commons/collections4/bag/TransformedBag.java b/src/main/java/org/apache/commons/collections4/bag/TransformedBag.java
index 9298d620b..34aa6e9f2 100644
--- a/src/main/java/org/apache/commons/collections4/bag/TransformedBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/TransformedBag.java
@@ -33,6 +33,7 @@ import org.apache.commons.collections4.set.TransformedSet;
  * <p>
  * This class is Serializable from Commons Collections 3.1.
  *
+ * @param <E> the type of elements in this bag
  * @since 3.0
  */
 public class TransformedBag<E> extends TransformedCollection<E> implements Bag<E> {
diff --git a/src/main/java/org/apache/commons/collections4/bag/TransformedSortedBag.java b/src/main/java/org/apache/commons/collections4/bag/TransformedSortedBag.java
index c723a789c..d33732e24 100644
--- a/src/main/java/org/apache/commons/collections4/bag/TransformedSortedBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/TransformedSortedBag.java
@@ -31,6 +31,7 @@ import org.apache.commons.collections4.Transformer;
  * <p>
  * This class is Serializable from Commons Collections 3.1.
  *
+ * @param <E> the type of elements in this bag
  * @since 3.0
  */
 public class TransformedSortedBag<E> extends TransformedBag<E> implements SortedBag<E> {
diff --git a/src/main/java/org/apache/commons/collections4/bag/TreeBag.java b/src/main/java/org/apache/commons/collections4/bag/TreeBag.java
index 084b21cbc..715871b97 100644
--- a/src/main/java/org/apache/commons/collections4/bag/TreeBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/TreeBag.java
@@ -38,6 +38,7 @@ import org.apache.commons.collections4.SortedBag;
  * copies of an object to be added or removed at once. It is important to read the interface
  * javadoc carefully as several methods violate the {@link Collection} interface specification.
  *
+ * @param <E> the type of elements in this bag
  * @since 3.0 (previously in main package v2.0)
  */
 public class TreeBag<E> extends AbstractMapBag<E> implements SortedBag<E>, Serializable {
diff --git a/src/main/java/org/apache/commons/collections4/bag/UnmodifiableBag.java b/src/main/java/org/apache/commons/collections4/bag/UnmodifiableBag.java
index 52fe51ff7..9100a6154 100644
--- a/src/main/java/org/apache/commons/collections4/bag/UnmodifiableBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/UnmodifiableBag.java
@@ -35,6 +35,7 @@ import org.apache.commons.collections4.set.UnmodifiableSet;
  * <p>
  * Attempts to modify it will result in an UnsupportedOperationException.
  *
+ * @param <E> the type of elements in this bag
  * @since 3.0
  */
 public final class UnmodifiableBag<E>
diff --git a/src/main/java/org/apache/commons/collections4/bag/UnmodifiableSortedBag.java b/src/main/java/org/apache/commons/collections4/bag/UnmodifiableSortedBag.java
index 7ea2c9468..c07e13458 100644
--- a/src/main/java/org/apache/commons/collections4/bag/UnmodifiableSortedBag.java
+++ b/src/main/java/org/apache/commons/collections4/bag/UnmodifiableSortedBag.java
@@ -35,6 +35,7 @@ import org.apache.commons.collections4.set.UnmodifiableSet;
  * <p>
  * Attempts to modify it will result in an UnsupportedOperationException.
  *
+ * @param <E> the type of elements in this bag
  * @since 3.0
  */
 public final class UnmodifiableSortedBag<E>