diff --git a/org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/extension/IEclipseResourceStorageLocationProvider.java b/org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/extension/IEclipseResourceStorageLocationProvider.java
index a0a1a1d8d8060b45974f79b3d8978c30e0799a2c..fbcd367f148a9efd30866ac8f3579ce973e904cc 100644
--- a/org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/extension/IEclipseResourceStorageLocationProvider.java
+++ b/org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/extension/IEclipseResourceStorageLocationProvider.java
@@ -36,13 +36,13 @@ import org.fortiss.tooling.kernel.service.IEclipseResourceStorageService;
  * @author hoelzlf
  * @author $Author$
  * @version $Rev$
- * @ConQAT.Rating GREEN Hash: B005A67C7F154C82209F24DB2DDAD99E
+ * @ConQAT.Rating GREEN Hash: 3AA02B7A5B29D6E1803E2BD90EE165DD
  */
 public interface IEclipseResourceStorageLocationProvider {
 
 	/**
 	 * Returns whether the given {@link IFile} should be considered as a model
-	 * file.
+	 * file (only files with an extension are given to this location provider).
 	 */
 	boolean isStorageLocation(IFile file);
 }
diff --git a/org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/internal/storage/eclipse/EclipseResourceStorageProvider.java b/org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/internal/storage/eclipse/EclipseResourceStorageProvider.java
index ac4fb1d974c1033c4248bbde21deab45d00a164c..74b3c195ac4856802e3e164527c8662fe9aaa9ff 100644
--- a/org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/internal/storage/eclipse/EclipseResourceStorageProvider.java
+++ b/org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/internal/storage/eclipse/EclipseResourceStorageProvider.java
@@ -130,6 +130,9 @@ public class EclipseResourceStorageProvider implements
 	 * location provider validates the given file as model storage file.
 	 */
 	private boolean checkLocationProvider(IFile file) {
+		if (file.getFileExtension() == null) {
+			return false;
+		}
 		for (IEclipseResourceStorageLocationProvider provider : storageProviderList) {
 			if (provider.isStorageLocation(file)) {
 				return true;