diff --git a/dependencymanager/core/src/main/java/org/apache/felix/dm/impl/dependencies/DependencyActivation.java b/dependencymanager/core/src/main/java/org/apache/felix/dm/impl/dependencies/DependencyActivation.java
new file mode 100644
index 0000000..7bb7546
--- /dev/null
+++ b/dependencymanager/core/src/main/java/org/apache/felix/dm/impl/dependencies/DependencyActivation.java
@@ -0,0 +1,7 @@
+package org.apache.felix.dm.impl.dependencies;
+
+public interface DependencyActivation
+{
+  public void start(DependencyService service);
+  public void stop(DependencyService service);
+}