Minor cleanup in the Metrics module:
 * Add missing Javadoc
 * Line formatting

No functional changes.
diff --git a/utils/misc/src/main/java/org/onlab/metrics/MetricsComponent.java b/utils/misc/src/main/java/org/onlab/metrics/MetricsComponent.java
index 996fa6f1..36064e4 100644
--- a/utils/misc/src/main/java/org/onlab/metrics/MetricsComponent.java
+++ b/utils/misc/src/main/java/org/onlab/metrics/MetricsComponent.java
@@ -24,14 +24,17 @@
         name = newName;
     }
 
-    @Override public String getName() {
+    @Override
+    public String getName() {
         return name;
     }
 
-    @Override public MetricsFeature registerFeature(final String featureName) {
+    @Override
+    public MetricsFeature registerFeature(final String featureName) {
         MetricsFeature feature = featuresRegistry.get(featureName);
         if (feature == null) {
-            final MetricsFeature createdFeature = new MetricsFeature(featureName);
+            final MetricsFeature createdFeature =
+                new MetricsFeature(featureName);
             feature = featuresRegistry.putIfAbsent(featureName, createdFeature);
             if (feature == null) {
                 feature = createdFeature;