diff -r c87042164cd8 -r b9ad6f933bc9 src/org/gege/caldavsyncadapter/android/entities/AndroidEvent.java
--- a/src/org/gege/caldavsyncadapter/android/entities/AndroidEvent.java	Thu Feb 12 21:40:00 2015 +0100
+++ b/src/org/gege/caldavsyncadapter/android/entities/AndroidEvent.java	Thu Feb 12 21:48:00 2015 +0100
@@ -72,6 +72,8 @@
 import java.net.URISyntaxException;
 import java.text.ParseException;
 
+import static org.junit.Assert.*;
+
 //import android.accounts.Account;
 //import android.content.ContentProviderClient;
 //import android.content.ContentValues;
@@ -317,6 +319,7 @@
     public boolean createIcs(String strUid) {
         boolean Result = false;
         TimeZone timeZone = null;
+        assertNotNull(Thread.currentThread().getContextClassLoader());
         TimeZoneRegistry registry = TimeZoneRegistryFactory.getInstance().createRegistry();
 //TODO: do not simply create the ics-file new. take into account the RAWDATA if available
 		/*