class SimpleDAO
{
    private Session session;
    private Transaction tx;

    public void create(Event event) throws DataAccessLayerException {
        try {
            startOperation();
            session.save(event);
            tx.commit();
        } catch (HibernateException e) {
            handleException(e);
        } finally {
            HibernateFactory.close(session);
        }
    }

...

    public static void main(String[] args)
    {
        SimpleEventDao eventDao = new SimpleEventDao();
        Event event1 = new Event();
        event1.setName("Events 1");

        eventDao.create(event1);

        Event event2 = new Event();
        event1.setName("Events 2");

        eventDao.create(event2);
    }
    class Event
    {
      private String name;
      public void setName(String _name){ this.name = _name; }
    }
}

start TX at the top
function();
function();
function();
end TX

function() {
load object 1
update object 1
}