SONAR suggestion - don't use generic exceptions

Change-Id: I77c4325281e94e189b7f1212a932f7e912b56b51
diff --git a/apps/vtn/vtnweb/src/main/java/org/onosproject/vtnweb/resources/FloatingIpWebResource.java b/apps/vtn/vtnweb/src/main/java/org/onosproject/vtnweb/resources/FloatingIpWebResource.java
index c510647..3c4daa5 100644
--- a/apps/vtn/vtnweb/src/main/java/org/onosproject/vtnweb/resources/FloatingIpWebResource.java
+++ b/apps/vtn/vtnweb/src/main/java/org/onosproject/vtnweb/resources/FloatingIpWebResource.java
@@ -170,8 +170,7 @@
         }
     }
 
-    private Collection<FloatingIp> createOrUpdateByInputStream(JsonNode subnode)
-            throws Exception {
+    private Collection<FloatingIp> createOrUpdateByInputStream(JsonNode subnode) {
         checkNotNull(subnode, JSON_NOT_NULL);
         Collection<FloatingIp> floatingIps = null;
         JsonNode floatingIpNodes = subnode.get("floatingips");