clean-up of imports

diff --git a/src/org/apache/xml/serializer/TreeWalker.java b/src/org/apache/xml/serializer/TreeWalker.java
index 652e098..1cbab45 100644
--- a/src/org/apache/xml/serializer/TreeWalker.java
+++ b/src/org/apache/xml/serializer/TreeWalker.java
@@ -20,6 +20,8 @@
 
 import java.io.File;
 
+import org.apache.xml.serializer.utils.AttList;
+import org.apache.xml.serializer.utils.DOM2Helper;
 import org.w3c.dom.Comment;
 import org.w3c.dom.Element;
 import org.w3c.dom.EntityReference;
@@ -32,8 +34,6 @@
 import org.xml.sax.ext.LexicalHandler;
 import org.xml.sax.helpers.LocatorImpl;
 
-import org.apache.xml.serializer.utils.AttList;
-import org.apache.xml.serializer.utils.DOM2Helper;
 
 /**
  * This class does a pre-order walk of the DOM tree, calling a ContentHandler