Issue with XML transormation to DB using Hibernate

package test;
import java.io.File;
import java.util.Iterator;
import java.util.List;
 
import org.dom4j.Document;
import org.dom4j.io.SAXReader;
import org.hibernate.EntityMode;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
 
 
 
public class ImportXMLToDB {
 
	/**
	 * @param args
	 */
	public static void main(String[] args)throws Exception {
		Configuration config=new Configuration();
		config.addFile("C://ecllipse//workspace//Hybernate//conf//portal.hbm.xml");
		//config.addFile("C://ecllipse//workspace//Hybernate//conf//hibernate.properties");
		SessionFactory sessionFactory=config.buildSessionFactory();
 
		Session sess =sessionFactory.openSession();
		org.hibernate.Transaction tx = sess.beginTransaction();
 
 
		Session dom4jSession = sess.getSession(EntityMode.DOM4J);
		SAXReader saxReader = new SAXReader();
		Document document = saxReader.read(new File("C://ecllipse//workspace//Hybernate//input//portal.xml"));
		List list = document.selectNodes("//taxonomy/*");
		
		
		Iterator iter = list.iterator();
		
 
 
		while (iter.hasNext()) {
			   Object obj = iter.next();
			  // org.dom4j.tree.DefaultElement element = (org.dom4j.tree.DefaultElement) catalog;
			  
			   dom4jSession.saveOrUpdate("category", obj);
			
			}
		sess.flush();
		 tx.commit();
		 sess.close();
 
 
 
 
	}
 
}