Dom4JWriter.addAttribute work incorrect, see attached test case.

I want:

<?xml version="1.0" encoding="UTF-8"?>
<root>
  <A attrA="valA"/>
  <B attrB="valB"/>
  <C attrC="valC"/>
</root>

but with code:

        StringWriter stringWriter = new StringWriter();
        XMLWriter writer = new XMLWriter(stringWriter);
        Dom4JWriter dom4JWriter = new Dom4JWriter(writer);

        dom4JWriter.startNode("root");

        dom4JWriter.startNode("A");
        dom4JWriter.addAttribute("attrA", "valA");
        dom4JWriter.endNode();

        dom4JWriter.startNode("B");
        dom4JWriter.addAttribute("attrB", "valB");
        dom4JWriter.endNode();

        dom4JWriter.startNode("C");
        dom4JWriter.addAttribute("attrC", "valC");
        dom4JWriter.endNode();

        dom4JWriter.endNode();

I get:

<?xml version="1.0" encoding="UTF-8"?>
<root>
  <A attrA="valA"/>
  <B attrA="valA" attrB="valB"/>
  <C attrA="valA" attrB="valB" attrC="valC"/>
</root>

I assume that "attributes.clear();" is necessary in Dom4JWriter.endNode() after "writer.write(element);" for correct working.