Issues while generating multiple files in an wizard

I finally found a solution for my problem by crawling through the Netbeans source code.

Just in case somebody is interested in my solution:

https://github.com/fafischer/te2m.de-netbeans/commit/bc4d7fbcddf4c92c8f95ea4a9703323d42f769da#diff-1f64b7e3c286fedfffda419ea7abd34c

--> method getTemplateByNameAndFolder(...)

BTW.: I just saw, my first post related to the multiple template issue is from 2011 *eg*.