Fix typos detected by Frank Wang

Change-Id: I86b2e302569eff89d7051321a4531c7e0dc242f9
diff --git a/protocols/bgp/api/src/main/java/org/onosproject/bgp/controller/BgpController.java b/protocols/bgp/api/src/main/java/org/onosproject/bgp/controller/BgpController.java
index b5cfe5a..a8520ce 100644
--- a/protocols/bgp/api/src/main/java/org/onosproject/bgp/controller/BgpController.java
+++ b/protocols/bgp/api/src/main/java/org/onosproject/bgp/controller/BgpController.java
@@ -151,7 +151,7 @@
     Set<BgpLinkListener> linkListener();
 
     /**
-     * Stores the exceptions occured during an active session.
+     * Stores the exceptions occurred during an active session.
      *
      * @param peerId BGP peer id
      * @param exception exceptions based on the peer id.
@@ -159,7 +159,7 @@
     void activeSessionExceptionAdd(String peerId, String exception);
 
     /**
-     * Stores the exceptions occured during an closed session.
+     * Stores the exceptions occurred during an closed session.
      *
      * @param peerId BGP peer id
      * @param exception exceptions based on the peer id