RDBMS tests and init of the new module

The tests to check some Expressions to SQL statement conversion and started the new module which will provide a tool to generate the RDBMS module configuration by reverse engineering  
I dont know, I feel that this would just add (a bit) more complex logic (the encapsulation) for almost no advantages, I mean, the two values come from the CRUDController interface, so you think we could put them together in Range object to move the validation for null to this new class, right ?