[Peter]

This error appears because you didn't do a begin transaction, and tried to do a commit of it
You didn't do this line t.beginTransaction();
example:

Code:

Session session = HibernateUtil.getSessionFactory().getCurrentSession();
session.beginTransaction();
        try {
            SQLQuery query = session.createSQLQuery("select name from condition");
            System.out.println(query.list().get(0).toString());
        } 
        catch (Exception ex) {
            ex.printStackTrace();
        }  
session.close();