added missing javadoc comments

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/functor/trunk@1183707 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/main/java/org/apache/commons/functor/generator/TransformedGenerator.java b/src/main/java/org/apache/commons/functor/generator/TransformedGenerator.java
index be0f088..9be1276 100644
--- a/src/main/java/org/apache/commons/functor/generator/TransformedGenerator.java
+++ b/src/main/java/org/apache/commons/functor/generator/TransformedGenerator.java
@@ -22,9 +22,15 @@
 /**
  * Generator that transforms the elements of another Generator.
  *
+ * @param <I> the type of elements held in the wrapped generator.
+ * @param <E> the type of elements held in this generator.
  * @version $Revision$ $Date$
  */
 public class TransformedGenerator<I, E> extends BaseGenerator<E> {
+
+    /**
+     * The UnaryFunction to apply to each element.
+     */
     private final UnaryFunction<? super I, ? extends E> func;
 
     /**