Try to fix accidental disabling of analyzers during large multi-module maven projects

Hi Jeremy,

after some debugging I found out why for some multi-module maven projects the list of dependencies scanned is zero. It appears that if after at least one module didn't result in any files to analyze for a given analyzer, it is completely disabled (without being re-enabled), so that subsequent modules during the same build will habe no files (via supportsExtension) checked.

Please check if the change is the correct way to solve the problem that multi-module maven builds are sometimes resulting in zero dependencies being identified. 

Thanks & best regards,
Christian
@cschneider4711