Fix typo

Change-Id: Ifdf6920c4968c29f4bbc0f13ad9a76daa7456556
diff --git a/core/api/src/main/java/org/onosproject/net/device/DeviceService.java b/core/api/src/main/java/org/onosproject/net/device/DeviceService.java
index 218ccca..f4671fb 100644
--- a/core/api/src/main/java/org/onosproject/net/device/DeviceService.java
+++ b/core/api/src/main/java/org/onosproject/net/device/DeviceService.java
@@ -99,7 +99,7 @@
     /**
      * Returns the list of port statistics associated with the device.
      *
-     * @param deviceId device identitifer
+     * @param deviceId device identifier
      * @return list of port statistics
      */
     List<PortStatistics> getPortStatistics(DeviceId deviceId);
@@ -107,7 +107,7 @@
     /**
      * Returns the list of port delta statistics associated with the device.
      *
-     * @param deviceId device identitifer
+     * @param deviceId device identifier
      * @return list of port statistics
      */
     List<PortStatistics> getPortDeltaStatistics(DeviceId deviceId);