Kafka app that listens to events from applications and pushes them to a kafka bus

Change-Id: I8026f13f10aa00f6389b89459fa8ebd74de289a3
diff --git a/src/main/java/org/opencord/kafka/EventBusService.java b/src/main/java/org/opencord/kafka/EventBusService.java
new file mode 100644
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+++ b/src/main/java/org/opencord/kafka/EventBusService.java
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+/*
+ * 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.kafka;
+
+import com.fasterxml.jackson.databind.JsonNode;
+
+/**
+ * Service for interacting with an event bus.
+ */
+public interface EventBusService {
+
+    /**
+     * Sends JSON-formatted data to the event bus.
+     *
+     * @param topic topic to send to
+     * @param data JSON data
+     */
+    void send(String topic, JsonNode data);
+}