Transaction tx = session.beginTransaction();
Beer hoegaarden = new Beer();
Brewery hoeBrewery = new Brewery();
hoeBrewery.getBeers().add( hoegaarden );
hoegaarden.setBrewery( hoeBrewery );
session.persist( hoeBrewery );
tx.commit();
session.clear();
tx = session.beginTransaction();
hoegaarden = get( session, Beer.class, hoegaarden.getId() );