public Resource createResource(URI uri) {
	Resource resource = super.createResource(uri);
	
	// creating a dummy resource
	dummyURI = uri.appendSegment("dummy");
	dummyResource = super.createResource(dummyURI);
	
	System.out.println("dummyresource = " + getDummyResource()); // not null
	System.out.println("resource.getResourceSet() = " + resource.getResourceSet()); // this is null, since the resource has not beed added so far to the resourceset
	
	// dummyResource = resource.getResourceSet().createResource(dummyURI);
	return resource;
}

URI dummyURI;
Resource dummyResource;

public URI getDummyURI() {
	return dummyURI;
}

public Resource getDummyResource() {
	return dummyResource; // this becomes null, if called later (after file has been loaded)
}