Index: src/java/com/thoughtworks/xstream/io/xml/StaxDriver.java
===================================================================
--- src/java/com/thoughtworks/xstream/io/xml/StaxDriver.java	(revision 844)
+++ src/java/com/thoughtworks/xstream/io/xml/StaxDriver.java	(working copy)
@@ -120,19 +120,29 @@
 
     public XMLInputFactory getInputFactory() {
         if (inputFactory == null) {
-            inputFactory = XMLInputFactory.newInstance();
+            inputFactory = constructInputFactory();
         }
         return inputFactory;
     }
 
+    protected XMLInputFactory constructInputFactory() {
+        return XMLInputFactory.newInstance();
+    }
+
     public XMLOutputFactory getOutputFactory() {
         if (outputFactory == null) {
-            outputFactory = XMLOutputFactory.newInstance();
-            outputFactory.setProperty("javax.xml.stream.isRepairingNamespaces", isRepairingNamespace() ? Boolean.TRUE : Boolean.FALSE);
+            outputFactory = constructOutputFactory();
         }
         return outputFactory;
     }
 
+    protected XMLOutputFactory constructOutputFactory() {
+        XMLOutputFactory factory = XMLOutputFactory.newInstance();
+        factory.setProperty("javax.xml.stream.isRepairingNamespaces",
+                isRepairingNamespace() ? Boolean.TRUE : Boolean.FALSE);
+        return factory;
+    }
+
     public boolean isRepairingNamespace() {
         return repairingNamespace;
     }