package pkg;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public class GoDB
{
   public static void main(String[] args)
   {
       Session session = null;

       try
       {     Configuration cfg = new Configuration();
          cfg.configure();
          SessionFactory sessionFactory = cfg.buildSessionFactory();
          session = sessionFactory.openSession();
          org.hibernate.Transaction tx = session.beginTransaction();

          Message msg = new Message();
          msg.setId(4);
          msg.setText("some txt");
          session.save(msg);
          System.out.println("done");
           tx.commit();
           session.flush();
           session.close();
       }
       catch(Exception e)
       {
         System.out.println(e.getMessage());
       }
       finally
       {
          // session.flush();
          // session.close();
       }
   }
}

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
   <session-factory>
       <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
         <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/message</property>
       <property name="hibernate.connection.username">root</property>
         <property name="hibernate.connection.password">xxx</property>
         <property name="hibernate.connection.pool_size">10</property>
         <property name="show_sql">true</property>
         <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
         <property name="hibernate.hbm2ddl.auto">update</property>
         <!-- Mapping files -->
         <mapping resource="pkg/message.hbm.xml"/>
   </session-factory>
</hibernate-configuration>