使用DB2的IBM Rational System Architect

Currently I am looking to setting up IBM Rational System Architect 11.4.3.0, however I need to get a database setup first to connect with it. I see from the system requirements it only supports SQL Server/Oracle. Due to various restrictions, I am unable to use this currently and the only available option is DB2. Is it possible to hook System Architect to DB2, and if so, how?Currently I am looking to setting up IBM Ration