Add missing interface

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1693229 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/scr-compat/src/main/java/org/apache/felix/scr/impl/compat/Activator.java b/scr-compat/src/main/java/org/apache/felix/scr/impl/compat/Activator.java
index f0f9c8c..7ba42b3 100644
--- a/scr-compat/src/main/java/org/apache/felix/scr/impl/compat/Activator.java
+++ b/scr-compat/src/main/java/org/apache/felix/scr/impl/compat/Activator.java
@@ -26,6 +26,7 @@
 
 import org.apache.felix.scr.ScrInfo;
 import org.apache.felix.scr.ScrService;
+import org.osgi.framework.BundleActivator;
 import org.osgi.framework.BundleContext;
 import org.osgi.framework.Constants;
 import org.osgi.framework.ServiceReference;
@@ -35,7 +36,7 @@
 import org.osgi.util.tracker.ServiceTrackerCustomizer;
 
 
-public class Activator
+public class Activator implements BundleActivator
 {
     // tracker of the runtime service
     private volatile ServiceTracker<ServiceComponentRuntime, ServiceComponentRuntime> runtimeTracker;