diff --git a/src/main/java/org/apache/commons/digester3/annotations/WithMemoryRulesBinder.java b/src/main/java/org/apache/commons/digester3/annotations/WithMemoryRulesBinder.java
index c9dc89b..ff16e4c 100644
--- a/src/main/java/org/apache/commons/digester3/annotations/WithMemoryRulesBinder.java
+++ b/src/main/java/org/apache/commons/digester3/annotations/WithMemoryRulesBinder.java
@@ -92,7 +92,7 @@
      * 
      *
      * @param bindingClass
-     * @return
+     * @return true if the specified element has not yet been marked
      */
     public boolean markAsBound( Class<?> bindingClass )
     {
@@ -103,7 +103,7 @@
      * 
      *
      * @param bindingClass
-     * @return
+     * @return true if the specified element has been marked
      */
     public boolean isAlreadyBound( Class<?> bindingClass )
     {
diff --git a/src/main/java/org/apache/commons/digester3/xmlrules/WithMemoryRulesBinder.java b/src/main/java/org/apache/commons/digester3/xmlrules/WithMemoryRulesBinder.java
index 84af124..bd4e69c 100644
--- a/src/main/java/org/apache/commons/digester3/xmlrules/WithMemoryRulesBinder.java
+++ b/src/main/java/org/apache/commons/digester3/xmlrules/WithMemoryRulesBinder.java
@@ -93,7 +93,7 @@
     }
 
     /**
-     * @return
+     * @return the pattern stack
      */
     public PatternStack getPatternStack()
     {
@@ -101,7 +101,7 @@
     }
 
     /**
-     * @return
+     * @return the set of included files
      */
     public Set<String> getIncludedFiles()
     {