Enable checkstyle check for blocks without braces.

Enable the checkstyle rule to check for block statements
without curly braces and fix any violations it finds.

Change-Id: Id4c58cea26f0d9ce7ed78643a4943c042886a12d
diff --git a/src/main/java/net/onrc/onos/core/topology/LinkEvent.java b/src/main/java/net/onrc/onos/core/topology/LinkEvent.java
index bf81f34..6f328f0 100644
--- a/src/main/java/net/onrc/onos/core/topology/LinkEvent.java
+++ b/src/main/java/net/onrc/onos/core/topology/LinkEvent.java
@@ -78,23 +78,30 @@
 
     @Override
     public boolean equals(Object obj) {
-        if (this == obj)
+        if (this == obj) {
             return true;
-        if (obj == null)
+        }
+        if (obj == null) {
             return false;
-        if (getClass() != obj.getClass())
+        }
+        if (getClass() != obj.getClass()) {
             return false;
+        }
         LinkEvent other = (LinkEvent) obj;
         if (dst == null) {
-            if (other.dst != null)
+            if (other.dst != null) {
                 return false;
-        } else if (!dst.equals(other.dst))
+            }
+        } else if (!dst.equals(other.dst)) {
             return false;
+        }
         if (src == null) {
-            if (other.src != null)
+            if (other.src != null) {
                 return false;
-        } else if (!src.equals(other.src))
+            }
+        } else if (!src.equals(other.src)) {
             return false;
+        }
         return true;
     }
 }