How can I use one texttemplate to generate text from N Diagrams in VS DSL Tools

Question

I´ve got a project with 10 DSL Diagrams. I´m generating SQL Code from them. Now a use one .tt for each diagram. When I make a new diagram I have to copy one .tt and change the name and the file reference.

So finally I end up with:

N diagrams, N .tt and N .sql file.

I want:

N diagrams, 1 .tt and 1 .sql file.