Issues with Drools Eclipse plugin

When generating a sample Drools project with the Eclipse plugin (6.0.x), there are several issues:

• When DroolsBuilder is trying to parse the Sample.drl, it seems to be failing to import the Message class (resulting in 11 errors in the problems view), see screenshot1. Executing the test does seem to work though

• When both Sample.drl and Sample.xls are created in the same project, the imports seems to clash, executing the test fails when compiling:
  java.lang.RuntimeException: Error while creating KieBase[Message [id=1, level=ERROR, path=rules/Sample.drl, line=15, column=0
  text=Rule Compilation error The import com.sample.DroolsTest.Message collides with another import statement], Message [id=2, level=ERROR, path=dtables/Sample.xls, line=15, column=0
  text=Rule Compilation error The import com.sample.DroolsTest.Message collides with another import statement], Message [id=3, level=ERROR, path=dtables/Sample.xls, line=5, column=0
  text=Rule Compilation error The import com.sample.DroolsTest.Message collides with another import statement], Message [id=4, level=ERROR, path=rules/Sample.drl, line=5, column=0
  text=Rule Compilation error The import com.sample.DroolsTest.Message collides with another import statement]]
  at org.drools.compiler.kie.builder.impl.KieContainerImpl.getKieBase(KieContainerImpl.java:170)
  at org.drools.compiler.kie.builder.impl.KieContainerImpl.newKieSession(KieContainerImpl.java:298)
  at org.drools.compiler.kie.builder.impl.KieContainerImpl.newKieSession(KieContainerImpl.java:273)
  at com.sample.DroolsTest.main(DroolsTest.java:17)
  Isn't this allowed?

• When executing DroolsTest, there seems to be a Sysout somewhere in the code base:
  kmodules: file:/NotBackedUp/jBPM-6.0.0.CR2/jbpm-installer/workspace/drools/target/META-INF/kmodule.xml