Hibernate - save() e saveOrUpdate()

public void actionPerformed( ActionEvent event )
	{
		Session session = null; 
		session = HibernateSessionFactory.openSession();
		ParoquiaDao paroquiaDao = new ParoquiaDao(session);		
		if(event.getActionCommand().equals("Cadastrar")){
			
				Paroquia paroquia = new Paroquia();
				paroquia.setNome(nomeText.getText());
				paroquia.setDescricao(descricaoField.getText());
				paroquia.setEndereco(enderecoTextPane.getText());
				paroquiaDao.save(paroquia);
			
		}
	}

package src.model.home;

import java.util.List;

import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.criterion.Order;
import org.hibernate.criterion.Projections;
import org.hibernate.criterion.Restrictions;

import src.model.Paroquia;

public class ParoquiaDao extends Dao<Paroquia>{

	Session session = super.getSession();
	
	public ParoquiaDao(Session session) {
		super(session, Paroquia.class);		
	}
	
	@SuppressWarnings("unchecked")
	public List<Paroquia> buscaParoquia(String descricao){
		Criteria c = session.createCriteria(Paroquia.class);
		c.add(Restrictions.ilike("descricao", descricao));
		c.addOrder(Order.asc("uf"));
		return c.list();
	}
	
	@SuppressWarnings("unchecked")
	public List<String> buscaNomesDeParoquias(){
		Criteria c = getSession().createCriteria(Paroquia.class);
		c.setProjection(Projections.property("descricao"));
		return c.list();
	}
	
	@SuppressWarnings("unchecked")
	public List<Paroquia> listaParoquias(){
		Criteria criteria = session.createCriteria( Paroquia.class );
		criteria.addOrder(Order.asc("nome"));
		return criteria.list();
	}
}

package src.model.home;

import org.apache.log4j.Logger;
import org.hibernate.Session;

public class Dao<T> {
	private static Logger logger = Logger.getLogger(Dao.class);
	private Class persistentClass;
	private Session session;
	
	public Dao(Session session, Class persistentClass){
		this.session = session;
		this.persistentClass = persistentClass;
	}
	
	protected Session getSession() {
		return session;
	}
	
	@SuppressWarnings("unchecked")
	public T load(Long id){
		logger.info("lendo "+persistentClass+"com id "+id);
		return (T) session.load(persistentClass, id);
	}
	
	public void save(T t){
		logger.info("salvando "+t);
		session.save(t);
	}
}

public void save(T t){
	logger.info("salvando "+t);
	Transaction transation = session.beginTransaction();
	logger.info("Abrindo Transacao " + transation);
	session.save(t);
	transation.commit();
}