I suggest using a service to save your objects. First, check all the objects for validity using the validate() method.
This is just a guess but possibly someplace to start. I don't pretend to understand when Hibernate decides to flush sessions and partially save data and the like. But what I do know is that putting all write related calls in a service saves me a ton of grief over time.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.