Wrap W3C DOM Element as a fluent interface

ElementWrapper.java

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.w3c.dom.Document;
import org.w3c.dom.Element;

public class ElementWrapper {
	
	Document doc;
	Element elemt;
	ElementWrapper parent;
	
	public ElementWrapper( String name ) {
		this( name, null );
	}
	
	public ElementWrapper( String name, ElementWrapper parent ) {
		if ( parent == null ) {
			try {
				DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
				DocumentBuilder builder = factory.newDocumentBuilder();
				doc = builder.newDocument();
				elemt = doc.createElement( name );
				doc.appendChild( elemt );
			} catch ( ParserConfigurationException e ) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		} else {
			this.parent = parent;
			this.doc = parent.doc;
			elemt = doc.createElement( name );
		}
	}
	
	public ElementWrapper add( String name ) {
		ElementWrapper new_elemt_wp = new ElementWrapper( name, this );
		elemt.appendChild( new_elemt_wp.getElement() );
		return new_elemt_wp;
	}
	
	public ElementWrapper set( String name, String value ) {
		Element tmp_elemt = doc.createElement( name );
		tmp_elemt.setTextContent( value );
		elemt.appendChild( tmp_elemt );
		return this;
	}
	
	public ElementWrapper end() {
		return parent;
	}
	
	public Document getDocument() {
		return doc;
	}
	
	public Element getElement() {
		return elemt;
	}
	
}

testElementWrapper.java

public class testElementWrapper {

	/**
	 * @param args
	 */
	public static void main( String[] args ) {
		ElementWrapper elemt1 = 
				new ElementWrapper( "TEMPLATE" )
			.set( "NAME", "test123" )
			.set( "CPU", "1" )
			.set( "MEMORY", "2048" )
			.add( "OS" )
				.set( "BOOT", "hd" )
				.set( "ARCH", "x86_64" ).end()
			.add( "DISK" ).set( "IMAGE_ID", "1" );
		
		ElementWrapper elemt2 = 
				new ElementWrapper( "TEMPLATE" )
			.set( "NAME", "test456" )
			.set( "CPU", "2" )
			.set( "MEMORY", "4096" )
			.add( "OS" )
				.set( "BOOT", "hd" )
				.set( "ARCH", "x86_64" ).end()
			.add( "DISK" ).set( "IMAGE_ID", "1" );
		
		//print xml
		System.out.println( elemt1.toString() );
		System.out.println( elemt2.toString() );
	}

}