jug = new JUG( "summer_camp" );
jug.setName( "JUG Summer Camp" );
em.persist( jug );
emmanuel = new Member( "emmanuel" );
emmanuel.setName( "Emmanuel Bernard" );
emmanuel.setMemberOf( jug );
jerome = new Member( "jerome" );
jerome.setName( "Jerome" );
jerome.setMemberOf( jug );
em.persist( emmanuel );
em.persist( jerome );