jMeter - No results / No Log information

I have set up a class extending AbstractJavaSamplerClientcontaining a setupTest, runTest and getDefaultParameters method, all written accordingly to the jMeter's templates and online examples.

Have added a Logger, tried setting it up normally (LoggingManager.getLoggerForClass();) and using super as well (super.getLogger();) and added multiple Logger.info and Logger.error

I'm using a Java request and giving a Jar containing my classes have completed the user.properties with the classpath. The right class is selected when running the tests.

When I run my tests, no custom logs appear. No error either. And I'm getting this:

2016/02/03 13:27:04 INFO  - jmeter.engine.StandardJMeterEngine: Running the test! 
2016/02/03 13:27:04 INFO  - jmeter.samplers.SampleEvent: List of sample_variables: [] 
2016/02/03 13:27:04 INFO  - jmeter.gui.util.JMeterMenuBar: setRunning(true,*local*) 
2016/02/03 13:27:04 INFO  - jmeter.engine.StandardJMeterEngine: Starting ThreadGroup: 1 : Group Test
2016/02/03 13:27:04 INFO  - jmeter.engine.StandardJMeterEngine: Starting 0 threads for group Group Test. 
2016/02/03 13:27:04 INFO  - jmeter.engine.StandardJMeterEngine: Thread will start next loop on error 
2016/02/03 13:27:04 INFO  - jmeter.threads.ThreadGroup: Starting thread group number 1 threads 0 ramp-up 1 perThread Infinity delayedStart=false 
2016/02/03 13:27:04 INFO  - jmeter.threads.ThreadGroup: Started thread group number 1 
2016/02/03 13:27:04 INFO  - jmeter.engine.StandardJMeterEngine: All thread groups have been started 
2016/02/03 13:27:04 INFO  - jmeter.engine.StandardJMeterEngine: Notifying test listeners of end of test 
2016/02/03 13:27:04 INFO  - jmeter.gui.util.JMeterMenuBar: setRunning(false,*local*) 

I've checked the user.properties and the logs are written to jmeter.log I feel like my class is not even tested since the logs are not displaying anything beside "Starting/Done/Finshed Thread".

When I add a result tree or any other result thread, it stays empty.

What could be set up wrong here?