added javadocs and comments
diff --git a/src/main/java/org.onosproject.xran/providers/CellDeviceProvider.java b/src/main/java/org.onosproject.xran/providers/CellDeviceProvider.java
index af2a24a..a0a5809 100644
--- a/src/main/java/org.onosproject.xran/providers/CellDeviceProvider.java
+++ b/src/main/java/org.onosproject.xran/providers/CellDeviceProvider.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015-present Open Networking Laboratory
+ * Copyright 2015-present Open Networking Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,10 +16,24 @@
 
 package org.onosproject.xran.providers;
 
-import org.apache.felix.scr.annotations.*;
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
 import org.onlab.packet.ChassisId;
-import org.onosproject.net.*;
-import org.onosproject.net.device.*;
+import org.onosproject.net.AnnotationKeys;
+import org.onosproject.net.DefaultAnnotations;
+import org.onosproject.net.Device;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.MastershipRole;
+import org.onosproject.net.PortNumber;
+import org.onosproject.net.SparseAnnotations;
+import org.onosproject.net.device.DefaultDeviceDescription;
+import org.onosproject.net.device.DeviceDescription;
+import org.onosproject.net.device.DeviceProvider;
+import org.onosproject.net.device.DeviceProviderRegistry;
+import org.onosproject.net.device.DeviceProviderService;
 import org.onosproject.net.provider.AbstractProvider;
 import org.onosproject.net.provider.ProviderId;
 import org.onosproject.xran.controller.XranController;
@@ -27,14 +41,12 @@
 import org.slf4j.Logger;
 
 import static org.onosproject.net.DeviceId.deviceId;
-import static org.onosproject.xran.entities.RnibCell.*;
+import static org.onosproject.xran.entities.RnibCell.uri;
 import static org.slf4j.LoggerFactory.getLogger;
 
-
 /**
- * Created by dimitris on 7/27/17.
+ * Cell device provider.
  */
-
 @Component(immediate = true)
 public class CellDeviceProvider extends AbstractProvider implements DeviceProvider {
 
@@ -87,6 +99,9 @@
 
     }
 
+    /**
+     * Internal device listener.
+     */
     private class InternalDeviceListener implements XranDeviceListener {
 
         @Override
@@ -95,6 +110,7 @@
                 return;
             }
 
+            // use ECGI as device ID URI
             DeviceId id = deviceId(uri(cell.getEcgi()));
 
             ChassisId cId = new ChassisId(id.hashCode());
diff --git a/src/main/java/org.onosproject.xran/providers/UeProvider.java b/src/main/java/org.onosproject.xran/providers/UeProvider.java
index 435c78a..e84deb2 100644
--- a/src/main/java/org.onosproject.xran/providers/UeProvider.java
+++ b/src/main/java/org.onosproject.xran/providers/UeProvider.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015-present Open Networking Laboratory
+ * Copyright 2015-present Open Networking Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,9 +17,19 @@
 package org.onosproject.xran.providers;
 
 import com.google.common.collect.Sets;
-import org.apache.felix.scr.annotations.*;
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
 import org.onlab.packet.VlanId;
-import org.onosproject.net.*;
+import org.onosproject.net.AnnotationKeys;
+import org.onosproject.net.DefaultAnnotations;
+import org.onosproject.net.Host;
+import org.onosproject.net.HostId;
+import org.onosproject.net.HostLocation;
+import org.onosproject.net.PortNumber;
+import org.onosproject.net.SparseAnnotations;
 import org.onosproject.net.host.DefaultHostDescription;
 import org.onosproject.net.host.HostProvider;
 import org.onosproject.net.host.HostProviderRegistry;
@@ -33,14 +43,13 @@
 
 import java.util.Set;
 
-import static org.onosproject.net.DeviceId.*;
-import static org.onosproject.xran.entities.RnibCell.*;
+import static org.onosproject.net.DeviceId.deviceId;
+import static org.onosproject.xran.entities.RnibCell.uri;
 import static org.slf4j.LoggerFactory.getLogger;
 
 /**
- * Created by dimitris on 7/28/17.
+ * UE Provider.
  */
-
 @Component(immediate = true)
 public class UeProvider extends AbstractProvider implements HostProvider {
 
@@ -78,6 +87,9 @@
 
     }
 
+    /**
+     * Internal host listener.
+     */
     class InternalHostListener implements XranHostListener {
 
         @Override
@@ -94,12 +106,15 @@
             try {
                 Set<HostLocation> hostLocations = Sets.newConcurrentHashSet();
 
-                ecgiSet.forEach(ecgi -> hostLocations.add(new HostLocation(deviceId(uri(ecgi)), PortNumber.portNumber(0), 0)));
+                ecgiSet.forEach(ecgi -> hostLocations
+                        .add(new HostLocation(deviceId(uri(ecgi)),
+                                PortNumber.portNumber(0), 0)));
 
                 SparseAnnotations annotations = DefaultAnnotations.builder()
                         .set(AnnotationKeys.NAME, "UE " + ue.getId())
                         .build();
 
+                // Host ID is calculated from UE ID with some hacky function to represent a MAC address.
                 DefaultHostDescription desc = new DefaultHostDescription(
                         ue.getHostId().mac(),
                         VlanId.vlanId(VlanId.UNTAGGED),
diff --git a/src/main/java/org.onosproject.xran/providers/XranDeviceListener.java b/src/main/java/org.onosproject.xran/providers/XranDeviceListener.java
index 01f0e95..10da57e 100644
--- a/src/main/java/org.onosproject.xran/providers/XranDeviceListener.java
+++ b/src/main/java/org.onosproject.xran/providers/XranDeviceListener.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015-present Open Networking Laboratory
+ * Copyright 2015-present Open Networking Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,11 +20,21 @@
 import org.onosproject.xran.entities.RnibCell;
 
 /**
- * Created by dimitris on 7/27/17.
+ * Xran Device Listener.
  */
 public interface XranDeviceListener {
 
+    /**
+     * Add new CELL as a device.
+     *
+     * @param id CELL entity
+     */
     void deviceAdded(RnibCell id);
 
+    /**
+     * Remove CELL.
+     *
+     * @param id CELL ECGI as device id
+     */
     void deviceRemoved(DeviceId id);
 }
diff --git a/src/main/java/org.onosproject.xran/providers/XranHostListener.java b/src/main/java/org.onosproject.xran/providers/XranHostListener.java
index 79676e3..d545018 100644
--- a/src/main/java/org.onosproject.xran/providers/XranHostListener.java
+++ b/src/main/java/org.onosproject.xran/providers/XranHostListener.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015-present Open Networking Laboratory
+ * Copyright 2015-present Open Networking Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,11 +23,22 @@
 import java.util.Set;
 
 /**
- * Created by dimitris on 7/28/17.
+ * Xran Host Listener.
  */
 public interface XranHostListener {
 
+    /**
+     * Add UE as a host with location the primary link.
+     *
+     * @param ue      UE entity
+     * @param ecgiSet All connected CELLs to this UE
+     */
     void hostAdded(RnibUe ue, Set<ECGI> ecgiSet);
 
+    /**
+     * Remove UE based on Host Id.
+     *
+     * @param id Host Id generated from UE id
+     */
     void hostRemoved(HostId id);
 }
diff --git a/src/main/java/org.onosproject.xran/providers/package-info.java b/src/main/java/org.onosproject.xran/providers/package-info.java
index a3ee964..608d5f6 100644
--- a/src/main/java/org.onosproject.xran/providers/package-info.java
+++ b/src/main/java/org.onosproject.xran/providers/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015-present Open Networking Laboratory
+ * Copyright 2015-present Open Networking Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.