[SEBA-37] Added 11 Statistics counters for Accounting Server operations

Change-Id: I7dda193129e5dffe62907775aaf8dfdc5b3f1bf1
diff --git a/api/src/main/java/org/opencord/aaa/AuthenticationStatisticsEvent.java b/api/src/main/java/org/opencord/aaa/AuthenticationStatisticsEvent.java
new file mode 100644
index 0000000..11c00e3
--- /dev/null
+++ b/api/src/main/java/org/opencord/aaa/AuthenticationStatisticsEvent.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.opencord.aaa;
+import org.onosproject.event.AbstractEvent;
+/**
+ * Event indicating the Accounting Data of AAA.
+ */
+public class AuthenticationStatisticsEvent extends
+        AbstractEvent<AuthenticationStatisticsEvent.Type, AaaStatistics> {
+/**
+ * Accounting data.
+ * AuthenticationMetrixEvent event type.
+ */
+    public enum Type {
+        /**
+         * signifies that the Authentication Metrix Event stats has been updated.
+         */
+        STATS_UPDATE
+    }
+    public AuthenticationStatisticsEvent(Type type, AaaStatistics stats) {
+        super(type, stats);
+    }
+}