// Interface defining module functionality public interface MyModule { void doSomething(); } // Module implementation public class MyModuleImpl implements MyModule { @Override public void doSomething() { System.out.println("Doing something in MyModuleImpl"); } } // Activator class for module public class Activator implements BundleActivator { @Override public void start(BundleContext context) throws Exception { // Register module as a service context.registerService(MyModule.class.getName(), new MyModuleImpl(), null); } @Override public void stop(BundleContext context) throws Exception { // Unregister module service context.unregisterService(MyModule.class.getName()); } } Manifest-Version: 1.0 Bundle-ManifestVersion: 2 Bundle-Name: MyModule Bundle-SymbolicName: com.example.mymodule Bundle-Version: 1.0.0 Bundle-Activator: com.example.mymodule.Activator Import-Package: org.osgi.framework