diff --git a/cs656/lab4/PresenceServiceImpl.java b/cs656/lab4/PresenceServiceImpl.java
new file mode 100644
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--- /dev/null
+++ b/cs656/lab4/PresenceServiceImpl.java
@@ -0,0 +1,66 @@
+
+import java.io.IOException;
+
+import org.restlet.Client;
+import org.restlet.data.Form;
+import org.restlet.data.Method;
+import org.restlet.data.Protocol;
+import org.restlet.data.Request;
+import org.restlet.data.Response;
+
+import edu.gvsu.cis.cs656.lab4.server.PresenceService;
+import edu.gvsu.cis.cs656.lab4.server.RegistrationInfo;
+
+public class MyApplicationTester implements PresenceService
+{
+	public static void main(String[] args)
+	{
+	}
+
+    /**
+     * Register a client with the presence service.
+     * @param reg The information that is to be registered about a client.
+     */
+    void register(RegistrationInfo reg) throws Exception
+    {
+    }
+
+    /**
+     * Unregister a client from the presence service.  Client must call this
+     * method when it terminates execution.
+     * @param userName The name of the user to be unregistered.
+     */
+    void unregister(String userName) throws Exception
+    {
+    }
+
+    /**
+     * Lookup the registration information of another client.
+     * @param name The name of the client that is to be located.
+     * @return The RegistrationInfo info for the client, or null if
+     * no such client was found.
+     */
+    RegistrationInfo lookup(String name) throws Exception
+    {
+        return null;
+    }
+
+    /**
+     * Sets the user's presence status.
+     * @param name The name of the user whose status is to be set.
+     * @param status true if user is available, false otherwise.
+     */
+    void setStatus(String userName, boolean status) throws Exception
+    {
+    }
+
+    /**
+     * Determine all users who are currently registered in the system.
+     * @return An array of RegistrationInfo objects - one for each client
+     * present in the system.
+     */
+    RegistrationInfo[] listRegisteredUsers() throws Exception
+    {
+        return null;
+    }
+}