Implementation of the DomainService

Change-Id: I012c31d113fbcc12d4c35cb10d11d7be4cd83458
diff --git a/core/api/src/main/java/org/onosproject/net/domain/DomainService.java b/core/api/src/main/java/org/onosproject/net/domain/DomainService.java
index 03c465e..476a367 100644
--- a/core/api/src/main/java/org/onosproject/net/domain/DomainService.java
+++ b/core/api/src/main/java/org/onosproject/net/domain/DomainService.java
@@ -47,4 +47,6 @@
      * @return null or the domain id of a device
      */
     DomainId getDomain(DeviceId deviceId);
-}
\ No newline at end of file
+
+}
+