SONAR suggestion - don't use generic exceptions

Change-Id: I77c4325281e94e189b7f1212a932f7e912b56b51
diff --git a/apps/ofagent/src/main/java/org/onosproject/ofagent/impl/OFMessageEncoder.java b/apps/ofagent/src/main/java/org/onosproject/ofagent/impl/OFMessageEncoder.java
index 256970d..060cb4a 100644
--- a/apps/ofagent/src/main/java/org/onosproject/ofagent/impl/OFMessageEncoder.java
+++ b/apps/ofagent/src/main/java/org/onosproject/ofagent/impl/OFMessageEncoder.java
@@ -26,8 +26,7 @@
 public final class OFMessageEncoder extends MessageToByteEncoder<Iterable<OFMessage>> {
 
     @Override
-    protected void encode(ChannelHandlerContext ctx, Iterable<OFMessage> msgList, ByteBuf out)
-            throws Exception {
+    protected void encode(ChannelHandlerContext ctx, Iterable<OFMessage> msgList, ByteBuf out) {
         if (!ctx.channel().isActive()) {
             return;
         }
diff --git a/apps/rabbitmq/src/main/java/org/onosproject/rabbitmq/util/MQUtil.java b/apps/rabbitmq/src/main/java/org/onosproject/rabbitmq/util/MQUtil.java
index f5f649b..cfcea12 100644
--- a/apps/rabbitmq/src/main/java/org/onosproject/rabbitmq/util/MQUtil.java
+++ b/apps/rabbitmq/src/main/java/org/onosproject/rabbitmq/util/MQUtil.java
@@ -225,7 +225,7 @@
             properties.load(is);
         } catch (Exception e) {
             log.error(ExceptionUtils.getFullStackTrace(e));
-            throw new RuntimeException(e);
+            throw new IllegalStateException(e);
         }
         return properties;
     }
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");