Callable<Void> call = new Callable<Void>()
{
@Override
public Void call() throws Exception
{
ViolationType t1 = ReportModelFactory.eINSTANCE.createViolationType();
ViolationType t2 = ReportModelFactory.eINSTANCE.createViolationType();
project.getContents().clear();
accessLayer.addElement(project, t1);
accessLayer.addElement(project, t2);