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/intent/ConstrainedBFSTree.java b/src/main/java/net/onrc/onos/core/intent/ConstrainedBFSTree.java
index c72ef4e..8704988 100644
--- a/src/main/java/net/onrc/onos/core/intent/ConstrainedBFSTree.java
+++ b/src/main/java/net/onrc/onos/core/intent/ConstrainedBFSTree.java
@@ -46,7 +46,9 @@
             Switch sw = switchQueue.poll();
             for (Link link : sw.getOutgoingLinks()) {
                 Switch reachedSwitch = link.getDstPort().getSwitch();
-                if (switchSearched.contains(reachedSwitch)) continue;
+                if (switchSearched.contains(reachedSwitch)) {
+                    continue;
+                }
                 if (intents != null &&
                     intents.getAvailableBandwidth(link) < bandwidth) {
                     continue;
diff --git a/src/main/java/net/onrc/onos/core/intent/Intent.java b/src/main/java/net/onrc/onos/core/intent/Intent.java
index a8a06b0..27067b3 100644
--- a/src/main/java/net/onrc/onos/core/intent/Intent.java
+++ b/src/main/java/net/onrc/onos/core/intent/Intent.java
@@ -82,16 +82,20 @@
 
     @Override
     public boolean equals(Object obj) {
-        if (this == obj)
+        if (this == obj) {
             return true;
-        if ((obj == null) || (getClass() != obj.getClass()))
+        }
+        if ((obj == null) || (getClass() != obj.getClass())) {
             return false;
+        }
         Intent other = (Intent) obj;
         if (id == null) {
-            if (other.id != null)
+            if (other.id != null) {
                 return false;
-        } else if (!id.equals(other.id))
+            }
+        } else if (!id.equals(other.id)) {
             return false;
+        }
         return true;
     }
 
diff --git a/src/main/java/net/onrc/onos/core/intent/IntentMap.java b/src/main/java/net/onrc/onos/core/intent/IntentMap.java
index 2124d25..0bba44b 100644
--- a/src/main/java/net/onrc/onos/core/intent/IntentMap.java
+++ b/src/main/java/net/onrc/onos/core/intent/IntentMap.java
@@ -117,21 +117,26 @@
     //================================================================================
 
     protected void putIntent(Intent intent) {
-        if (intents.containsKey(intent.getId()))
+        if (intents.containsKey(intent.getId())) {
             removeIntent(intent.getId());
+        }
         intents.put(intent.getId(), intent);
         events.add(new ChangedEvent(ChangedEventType.ADDED, intent));
     }
 
     protected void removeIntent(String intentId) {
         Intent intent = intents.remove(intentId);
-        if (intent == null) return;
+        if (intent == null) {
+            return;
+        }
         events.add(new ChangedEvent(ChangedEventType.REMOVED, intent));
     }
 
     protected void setState(String intentId, IntentState state) {
         Intent intent = intents.get(intentId);
-        if (intent == null) return;
+        if (intent == null) {
+            return;
+        }
         intent.setState(state);
         events.add(new ChangedEvent(ChangedEventType.STATE_CHANGED, intent));
     }
diff --git a/src/main/java/net/onrc/onos/core/intent/PathIntentMap.java b/src/main/java/net/onrc/onos/core/intent/PathIntentMap.java
index ad6b1a5..f97b4c1 100644
--- a/src/main/java/net/onrc/onos/core/intent/PathIntentMap.java
+++ b/src/main/java/net/onrc/onos/core/intent/PathIntentMap.java
@@ -41,7 +41,9 @@
 
     @Override
     protected void putIntent(Intent intent) {
-        if (!(intent instanceof PathIntent)) return; // TODO throw exception
+        if (!(intent instanceof PathIntent)) {
+            return; // TODO throw exception
+        }
         super.putIntent(intent);
 
         PathIntent pathIntent = (PathIntent) intent;
@@ -96,14 +98,17 @@
      * @return
      */
     public Double getAvailableBandwidth(Link link) {
-        if (link == null) return null;
+        if (link == null) {
+            return null;
+        }
         Double bandwidth = link.getCapacity();
         LinkEvent linkEvent = new LinkEvent(link);
         if (!bandwidth.isInfinite()) {
             for (PathIntent intent : getIntentsByLink(linkEvent)) {
                 Double intentBandwidth = intent.getBandwidth();
-                if (intentBandwidth == null || intentBandwidth.isInfinite() || intentBandwidth.isNaN())
+                if (intentBandwidth == null || intentBandwidth.isInfinite() || intentBandwidth.isNaN()) {
                     continue;
+                }
                 bandwidth -= intentBandwidth;
             }
         }
diff --git a/src/main/java/net/onrc/onos/core/intent/runtime/PathCalcRuntime.java b/src/main/java/net/onrc/onos/core/intent/runtime/PathCalcRuntime.java
index 0600fe3..5a6d2e9 100644
--- a/src/main/java/net/onrc/onos/core/intent/runtime/PathCalcRuntime.java
+++ b/src/main/java/net/onrc/onos/core/intent/runtime/PathCalcRuntime.java
@@ -101,9 +101,9 @@
                     // generate new path-intent ID
                     String oldPathIntentId = spIntent.getPathIntentId();
                     String newPathIntentId;
-                    if (oldPathIntentId == null)
+                    if (oldPathIntentId == null) {
                         newPathIntentId = PathIntent.createFirstId(spIntent.getId());
-                    else {
+                    } else {
                         newPathIntentId = PathIntent.createNextId(oldPathIntentId);
 
                         // Request removal of low-level intent if it exists.
diff --git a/src/main/java/net/onrc/onos/core/intent/runtime/PathCalcRuntimeModule.java b/src/main/java/net/onrc/onos/core/intent/runtime/PathCalcRuntimeModule.java
index ddfaa38..5672c58 100755
--- a/src/main/java/net/onrc/onos/core/intent/runtime/PathCalcRuntimeModule.java
+++ b/src/main/java/net/onrc/onos/core/intent/runtime/PathCalcRuntimeModule.java
@@ -95,14 +95,16 @@
     // ================================================================================
 
     private void reroutePaths(Collection<Intent> oldPaths) {
-        if (oldPaths == null || oldPaths.isEmpty())
+        if (oldPaths == null || oldPaths.isEmpty()) {
             return;
+        }
 
         IntentOperationList reroutingOperation = new IntentOperationList();
         for (Intent intent : oldPaths) {
             PathIntent pathIntent = (PathIntent) intent;
-            if (pathIntent.isPathFrozen())
+            if (pathIntent.isPathFrozen()) {
                 continue;
+            }
             if (pathIntent.getState().equals(IntentState.INST_ACK) && // XXX: path intents in flight
                     !reroutingOperation.contains(pathIntent.getParentIntent())) {
                 reroutingOperation.add(Operator.ADD, pathIntent.getParentIntent());
@@ -162,8 +164,9 @@
 
     @Override
     public IntentOperationList executeIntentOperations(IntentOperationList list) {
-        if (list == null || list.size() == 0)
+        if (list == null || list.size() == 0) {
             return null;
+        }
         PerfLogger p = new PerfLogger("executeIntentOperations_" + list.get(0).operator);
 
         lock.lock(); // TODO optimize locking using smaller steps
@@ -325,18 +328,21 @@
                 removedLinkEvents.size() > 0 ||
                 removedPortEvents.size() > 0) {
             p.log("begin_getIntentsByLink");
-            for (LinkEvent linkEvent : removedLinkEvents)
+            for (LinkEvent linkEvent : removedLinkEvents) {
                 affectedPaths.addAll(pathIntents.getIntentsByLink(linkEvent));
+            }
             p.log("end_getIntentsByLink");
 
             p.log("begin_getIntentsByPort");
-            for (PortEvent portEvent : removedPortEvents)
+            for (PortEvent portEvent : removedPortEvents) {
                 affectedPaths.addAll(pathIntents.getIntentsByPort(portEvent.getDpid(), portEvent.getNumber()));
+            }
             p.log("end_getIntentsByPort");
 
             p.log("begin_getIntentsByDpid");
-            for (SwitchEvent switchEvent : removedSwitchEvents)
+            for (SwitchEvent switchEvent : removedSwitchEvents) {
                 affectedPaths.addAll(pathIntents.getIntentsByDpid(switchEvent.getDpid()));
+            }
             p.log("end_getIntentsByDpid");
         }
         p.log("begin_reroutePaths");
@@ -371,13 +377,16 @@
             IntentStateList pathIntentStates = new IntentStateList();
             for (Entry<String, IntentState> entry : value.entrySet()) {
                 PathIntent pathIntent = (PathIntent) pathIntents.getIntent(entry.getKey());
-                if (pathIntent == null) continue;
+                if (pathIntent == null) {
+                    continue;
+                }
 
                 Intent parentIntent = pathIntent.getParentIntent();
                 if (parentIntent == null ||
                         !(parentIntent instanceof ShortestPathIntent) ||
-                        !((ShortestPathIntent) parentIntent).getPathIntentId().equals(pathIntent.getId()))
+                        !((ShortestPathIntent) parentIntent).getPathIntentId().equals(pathIntent.getId())) {
                     continue;
+                }
 
                 IntentState state = entry.getValue();
                 switch (state) {