Extra null checks

git-svn-id: https://svn.apache.org/repos/asf/jakarta/bsf/trunk@758401 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/bsf3/bsf-api/src/test/java/org/apache/bsf/ScriptEngineManagerTest.java b/bsf3/bsf-api/src/test/java/org/apache/bsf/ScriptEngineManagerTest.java
index 329e5f9..515ca4f 100644
--- a/bsf3/bsf-api/src/test/java/org/apache/bsf/ScriptEngineManagerTest.java
+++ b/bsf3/bsf-api/src/test/java/org/apache/bsf/ScriptEngineManagerTest.java
@@ -72,9 +72,11 @@
 		ScriptEngine engine;
 		
 		engine =  mgr.getEngineByExtension("tEst");
+        assertNotNull(engine);
 		assertTrue(engine instanceof TestScriptEngine);
 		
 		engine = mgr.getEngineByExtension("teSt");
+        assertNotNull(engine);
 		assertTrue(engine instanceof TestScriptEngine);
 	}