Add TODO memo + cosmetics

Change-Id: If0e82e42893a8cb5e04087622f727d1fd8df5210

@@ -46,6 +46,7 @@ import static com.google.common.base.Preconditions.checkArgument;
 import static org.onlab.onos.net.device.DeviceEvent.Type.*;
 import static org.slf4j.LoggerFactory.getLogger;
 
+//TODO: Add support for multiple provider and annotations
 /**
  * Manages inventory of infrastructure devices using a protocol that takes into consideration
  * the order in which device events occur.

@@ -42,6 +42,7 @@ import com.google.common.collect.ImmutableSet.Builder;
 import static com.google.common.base.Preconditions.checkArgument;
 import static com.google.common.base.Preconditions.checkState;
 
+//TODO: Add support for multiple provider and annotations
 /**
  * Manages inventory of infrastructure links using a protocol that takes into consideration
  * the order in which events occur.

@@ -47,6 +47,7 @@ import static com.google.common.cache.CacheBuilder.newBuilder;
 import static org.onlab.onos.net.device.DeviceEvent.Type.*;
 import static org.slf4j.LoggerFactory.getLogger;
 
+//TODO: Add support for multiple provider and annotations
 /**
  * Manages inventory of infrastructure devices using Hazelcast-backed map.
  */

@@ -38,6 +38,7 @@ import com.google.common.collect.Multimap;
 import com.google.common.collect.ImmutableSet.Builder;
 import com.hazelcast.core.IMap;
 
+//TODO: Add support for multiple provider and annotations
 /**
  * Manages inventory of infrastructure links using Hazelcast-backed map.
  */

@@ -32,6 +32,7 @@ import static org.onlab.onos.net.Link.Type.INDIRECT;
 import static org.onlab.onos.net.link.LinkEvent.Type.*;
 import static org.slf4j.LoggerFactory.getLogger;
 
+// TODO: Add support for multiple provider and annotations
 /**
  * Manages inventory of infrastructure links using trivial in-memory structures
  * implementation.