diff --git a/querydsl-jdoql/src/main/java/com/mysema/query/jdoql/JDOQLSerializer.java b/querydsl-jdoql/src/main/java/com/mysema/query/jdoql/JDOQLSerializer.java
index b207c6134..3c09d020d 100644
--- a/querydsl-jdoql/src/main/java/com/mysema/query/jdoql/JDOQLSerializer.java
+++ b/querydsl-jdoql/src/main/java/com/mysema/query/jdoql/JDOQLSerializer.java
@@ -34,6 +34,7 @@ import com.mysema.query.types.path.Path;
 import com.mysema.query.types.query.SubQuery;
 
 /**
+ * JDOQLSerializer serializes Querydsl queries and expressions into JDOQL strings
  * 
  * @author tiwe
  * 
@@ -278,7 +279,7 @@ public final class JDOQLSerializer extends SerializerBase<JDOQLSerializer> {
     }
 
     @Override
-    public void visit(SubQuery query) {
+    public void visit(SubQuery<?> query) {
         append("(");
         serialize(query.getMetadata(), false, true);
         append(")");
diff --git a/querydsl-jdoql/src/main/java/com/mysema/query/jdoql/JDOQLSubQuery.java b/querydsl-jdoql/src/main/java/com/mysema/query/jdoql/JDOQLSubQuery.java
index 740a241f7..4df702bb2 100644
--- a/querydsl-jdoql/src/main/java/com/mysema/query/jdoql/JDOQLSubQuery.java
+++ b/querydsl-jdoql/src/main/java/com/mysema/query/jdoql/JDOQLSubQuery.java
@@ -17,6 +17,8 @@ import com.mysema.query.types.path.PEntity;
 import com.mysema.query.types.path.Path;
 
 /**
+ * JDOQLSubQuery is subquery implementation for JDOQL
+ * 
  * @author tiwe
  *
  */