Refactoring file structure for protobufs.

Change-Id: I50daf100d54750f97158304d87813e67861b1422
diff --git a/incubator/protobuf/services/nb/src/main/java/org/onosproject/incubator/protobuf/services/nb/DeleteMe.java b/incubator/protobuf/services/nb/src/main/java/org/onosproject/incubator/protobuf/services/nb/DeleteMe.java
new file mode 100644
index 0000000..69f61c4
--- /dev/null
+++ b/incubator/protobuf/services/nb/src/main/java/org/onosproject/incubator/protobuf/services/nb/DeleteMe.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2017-present Open Networking Laboratory
+ *
+ * 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.onosproject.incubator.protobuf.services.nb;
+
+/**
+ * Delete this file.  It is just a placeholder for structure.
+ */
+public class DeleteMe {
+    public DeleteMe() {
+        throw new RuntimeException("This is not a class that should be instantiated.");
+    }
+}
diff --git a/incubator/protobuf/services/nb/src/main/java/org/onosproject/incubator/protobuf/services/nb/package-info.java b/incubator/protobuf/services/nb/src/main/java/org/onosproject/incubator/protobuf/services/nb/package-info.java
new file mode 100644
index 0000000..f3b12c8
--- /dev/null
+++ b/incubator/protobuf/services/nb/src/main/java/org/onosproject/incubator/protobuf/services/nb/package-info.java
@@ -0,0 +1,19 @@
+/*
+ * Copyright 2017-present Open Networking Laboratory
+ *
+ * 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.
+ */
+/**
+ * gRPC server implementations for northbound services.
+ */
+package org.onosproject.incubator.protobuf.services.nb;
diff --git a/incubator/protobuf/services/nb/src/main/proto/PlaceHolderToDelete.proto b/incubator/protobuf/services/nb/src/main/proto/PlaceHolderToDelete.proto
new file mode 100644
index 0000000..d1207dd
--- /dev/null
+++ b/incubator/protobuf/services/nb/src/main/proto/PlaceHolderToDelete.proto
@@ -0,0 +1,6 @@
+syntax="proto3";
+option java_package = "org.onosproject.grpc.net.services.nb";
+
+message ToDelete{
+
+}
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