Packager is supposed to work for pure java apps as well as for fx apps. currently deploy with nativeBundles=all fails for regular java jars (same thing works for FX) with the following messages:

 Skip [Linux Application Bundler] due to [Main application jar is missing.]
 Skip [RPM bundler] due to [Main application jar is missing.]
 Skip [DEB bundler] due to [Main application jar is missing.]

I guess the reason is that these jars are regular jars build with standard ant jar task (not fx:jar)