EMFModelResource: add a null check for protecting against NPE from standalone resources
diff --git a/plugins/org.hawk.emf/src/org/hawk/emf/model/EMFModelResource.java b/plugins/org.hawk.emf/src/org/hawk/emf/model/EMFModelResource.java
index e589ddf..4dc7792 100644
--- a/plugins/org.hawk.emf/src/org/hawk/emf/model/EMFModelResource.java
+++ b/plugins/org.hawk.emf/src/org/hawk/emf/model/EMFModelResource.java
@@ -85,7 +85,9 @@
 	@Override

 	public void unload() {

 		res.unload();

-		res.getResourceSet().getResources().remove(res);

+		if (res.getResourceSet() != null) {

+			res.getResourceSet().getResources().remove(res);

+		}

 

 		res = null;

 		allContents = null;