NewCategoryDAO - Initializes this object with the user ID from context.

NewCategoryRepository - Initializes a sample repository with config values set.

NewCategoryUserModel - initializes the user model.

CategoryDAO - Caller would ipmlement the relevant DAO which would include the model to be saved along with any other key values (e.g.

CategoryRepository - Database interface to the Category table.

CategoryUserModel - repository model object to enable future non-direct model adds where appropriate.