Development of java module

Hi! I am trying to run an exemple module made with Java in netbeans but when i run it, the module does not appear on the list of modules. I did put there the service provider for net beans to know what class to run in runtime. I have 4 classes: SampleIngestModuleFactory, SampleFileIngestModule, SampleIngestModuleIngestJobSettings and SampleModuleIngestJobSettings, am i doing something wrong? I need something else for this to work?

Also, do you think that it is useful to do a more in depth tutorial on development of a java module?