public void testCreate() {
PersistenceManager pm = pmf.getPersistenceManager();
try {
Mother m1 = new Mother(1,"mother1", true);
Mother m2 = new Mother(2,"mother2", true);
Daughter d1 = new Daughter(3,"daughter1", false, new Long(3));
Daughter d2 = new Daughter(4,"daughter2", false, new Long(4));
Collection col = new ArrayList();
col.add(m1);
col.add(m2);
col.add(d1);
col.add(d2);