Routing: create and modify. How to create an interface in commun ??

Hello,

I have to create a MF to create or modify a rounting.

I'm using the following bapi to do it into my MF:

BAPI_ES_ROUTING_CHANGE to change

BAPI_ROUTING_CREATE to create

The interface of these 2 bapi are different, anyway there's a way to create a unique interface on my MF and than

inside a MF call the first or second bapi to manage routing ?

Tks a lot,

R.