EcliseLink starts by dropping table constraints (the alter statement you're seeing), then the tables, and then recreate everything. Since you are using an in-memory database, there is actually nothing to drop and EclipseLink reports the failed attempts as a warning. Just ignore them.
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.