Added notion of a general Store abstraction and wired it up in ClusterStore.
diff --git a/apps/foo/pom.xml b/apps/foo/pom.xml
new file mode 100644
index 0000000..b86d2e9
--- /dev/null
+++ b/apps/foo/pom.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.onlab.onos</groupId>
+        <artifactId>onos-apps</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+
+    <artifactId>onos-app-foo</artifactId>
+    <packaging>bundle</packaging>
+
+    <description>ONOS application for miscellaneous experiments</description>
+
+</project>
diff --git a/apps/foo/src/main/java/org/onlab/onos/foo/FooComponent.java b/apps/foo/src/main/java/org/onlab/onos/foo/FooComponent.java
new file mode 100644
index 0000000..b9251dd
--- /dev/null
+++ b/apps/foo/src/main/java/org/onlab/onos/foo/FooComponent.java
@@ -0,0 +1,48 @@
+package org.onlab.onos.foo;
+
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
+import org.onlab.onos.cluster.ClusterEvent;
+import org.onlab.onos.cluster.ClusterEventListener;
+import org.onlab.onos.cluster.ClusterService;
+import org.slf4j.Logger;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Playground app component.
+ */
+@Component(immediate = true)
+public class FooComponent {
+
+    private final Logger log = getLogger(getClass());
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected ClusterService clusterService;
+
+    private ClusterEventListener clusterListener = new InnerClusterListener();
+
+    @Activate
+    public void activate() {
+        clusterService.addListener(clusterListener);
+        log.info("Started");
+    }
+
+    @Deactivate
+    public void deactivate() {
+        clusterService.removeListener(clusterListener);
+        log.info("Stopped");
+    }
+
+    private class InnerClusterListener implements ClusterEventListener {
+        @Override
+        public void event(ClusterEvent event) {
+            log.info("WOOOOT! {}", event);
+        }
+    }
+}
+
+
diff --git a/apps/pom.xml b/apps/pom.xml
index 078a92d..de9faa7 100644
--- a/apps/pom.xml
+++ b/apps/pom.xml
@@ -19,6 +19,7 @@
     <modules>
         <module>tvue</module>
         <module>fwd</module>
+        <module>foo</module>
     </modules>
 
     <properties>