CMPUT301F14T14/Project — pull request #155 by linster (2014-11-20 05:06:20+00:00)
Title: Increasted type safety on callbacks

No more willy-nilly casting from Object to your type of choice. Callback is now a parameterized type Callback. DataManager methods now expect a certain type of Callback. Eclipse should now warn you if your types are mismatched (so we don't run into runtime ClassCastExceptions).