Create Header Elements with Java Xerces XML Creation

How can I add standard header statements to XML documents that I generate using Java Xerces?

Something like this:?

<?xml version="1.0" encoding="utf-8"?>
<!--My Comment for this XML File -->
<?TSMKey applanguage="EN" appversion="4.3.0" dtdversion="1.6.2"?>
<!DOCTYPE KEYS SYSTEM "C:\TSM\System\DTD\TSMLte.dtd">

I'm getting the <?xml> tag by default now, but how can I add the other header elements?

    DocumentBuilderFactory docFactory =  DocumentBuilderFactory.newInstance();
    DocumentBuilder docBuilder = docFactory.newDocumentBuilder();

    Document doc = docBuilder.newDocument();
    Element rootElement = doc.createElement("TOP");
    doc.appendChild(rootElement);

    DOMSource domSource = new DOMSource(doc);