Refactoring file structure for protobufs.

Change-Id: I50daf100d54750f97158304d87813e67861b1422
diff --git a/incubator/protobuf/models/src/main/proto/DeviceDescriptionProto.proto b/incubator/protobuf/models/src/main/proto/DeviceDescriptionProto.proto
new file mode 100644
index 0000000..b620bfa
--- /dev/null
+++ b/incubator/protobuf/models/src/main/proto/DeviceDescriptionProto.proto
@@ -0,0 +1,18 @@
+syntax = "proto3";
+option java_package = "org.onosproject.grpc.net.models";
+
+package Device;
+
+import "DeviceEnums.proto";
+
+message DeviceDescription {
+    string device_Uri = 1;
+    Device.DeviceType type = 2;
+    string manufacturer = 3;
+    string hw_version = 4;
+    string sw_version = 5;
+    string serial_number = 6;
+    string chassis_id = 7;
+    map<string, string> annotations = 8;
+    bool is_default_available = 9;
+}
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