Adding and fixing javados.

Change-Id: I38eddb0b11630cdd83c5d1e5d5dc393ee2555897
diff --git a/docs/pom.xml b/docs/pom.xml
index 3a1bfb9..eec3b1e 100644
--- a/docs/pom.xml
+++ b/docs/pom.xml
@@ -61,7 +61,7 @@
                         <group>
                             <title>Core Subsystems</title>
                             <packages>
-                                org.onosproject.impl:org.onosproject.core.impl:org.onosproject.cluster.impl:org.onosproject.net.device.impl:org.onosproject.net.link.impl:org.onosproject.net.host.impl:org.onosproject.net.topology.impl:org.onosproject.net.packet.impl:org.onosproject.net.flow.impl:org.onosproject.net.*.impl:org.onosproject.event.impl:org.onosproject.net.intent.impl:org.onosproject.net.proxyarp.impl:org.onosproject.mastership.impl:org.onosproject.net.resource.impl:org.onosproject.json:org.onosproject.json.*:org.onosproject.provider.host.impl:org.onosproject.provider.lldp.impl:org.onosproject.net.statistic.impl:org.onosproject.app.impl:org.onosproject.common.*
+                                org.onosproject.impl:org.onosproject.core.impl:org.onosproject.cluster.impl:org.onosproject.net.device.impl:org.onosproject.net.link.impl:org.onosproject.net.host.impl:org.onosproject.net.topology.impl:org.onosproject.net.packet.impl:org.onosproject.net.flow.impl:org.onosproject.net.*.impl:org.onosproject.event.impl:org.onosproject.net.intent.impl:org.onosproject.net.proxyarp.impl:org.onosproject.mastership.impl:org.onosproject.net.resource.impl:org.onosproject.json:org.onosproject.json.*:org.onosproject.provider.host.impl:org.onosproject.provider.lldp.impl:org.onosproject.net.statistic.impl:org.onosproject.app.impl:org.onosproject.common.*:org.onosproject.net.group.impl
                             </packages>
                         </group>
                         <group>
@@ -78,6 +78,13 @@
                             </packages>
                         </group>
                         <group>
+                            <title>Null Providers
+                            </title>
+                            <packages>
+                                org.onosproject.provider.nil.*
+                            </packages>
+                        </group>
+                        <group>
                             <title>Utilities</title>
                             <packages>
                                 org.onlab.*