Detail d1 = new Detail();
Detail d2 = new Detail();
d2.setI(22);
Master m = new Master();
Master m0 = new Master();
Serializable m0id = s.save(m0);
m0.addDetail(d1); m0.addDetail(d2);
d1.setMaster(m0); d2.setMaster(m0);
m.getMoreDetails().add(d1);
m.getMoreDetails().add(d2);
Serializable mid = s.save(m);