Resource resource = rs.getResource(URI
.createURI("platform:/resource/org.eclipse.xtext/model/parsetree.genmodel"), true);
GenModel genModel = (GenModel) resource.getContents().get(0);
genModel.setForceOverwrite(true);
genModel.setCanGenerate(true);
genModel.reconcile();
Generator generator = new Generator();
generator.getAdapterFactoryDescriptorRegistry().addDescriptor(GenModelPackage.eNS_URI,
new GeneratorAdapterFactory.Descriptor() {
public GeneratorAdapterFactory createAdapterFactory() {