JUMP Database Module is an collection of classes that are wrappers and facades around the Apple Core Data Framework.
You should have at least an basic experiencie with this powerful Apple framework to fully understand this module, he doesn't abstract or replace the Core Data, it just make your life more easy.
The main component of this module are the Database Manager. The manager center the main Core Data components in a single class and facilitate a collection of methods to perform main tasks around it. Also the manager could be used as a Singleton Instance facilitating even more your database operations.
This diagram shows all components of the Database Manager operations and his components.