TSMasterTwo m0 = new TSMasterTwo();
m0.setName("m1");
m0.addDetail(new TSDetailTwo("m1 detail 1"));
m0.addDetail(new TSDetailTwo("m1 detail 2"));
Ebean.save(m0);
TSMasterTwo master = Ebean.find(TSMasterTwo.class, m0.getId());
List<TSDetailTwo> details = master.getDetails();