added maven-javadoc plugin with doclava

pom.xml

@@ -157,6 +157,36 @@
         </configuration>
       </plugin>
       
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-javadoc-plugin</artifactId>
+        <version>2.8</version>
+        <configuration>
+          <docletArtifact>
+            <groupId>com.google.doclava</groupId>
+            <artifactId>doclava</artifactId>
+            <version>1.0.3</version>
+          </docletArtifact>
+          <doclet>com.google.doclava.Doclava</doclet>
+          <!--
+            | bootclasspath required by Sun's JVM
+          -->
+          <bootclasspath>${sun.boot.class.path}</bootclasspath>
+          <additionalparam>
+             -quiet
+             -federate JDK http://download.oracle.com/javase/6/docs/api/index.html?
+             -federationxml JDK http://doclava.googlecode.com/svn/static/api/openjdk-6.xml
+             -hdf project.name "${project.name}"
+             -d ${project.build.directory}/apidocs
+           </additionalparam>
+          <useStandardDocletOptions>false</useStandardDocletOptions>
+          <!--
+            | Apple's JVM sometimes requires more memory
+          -->
+          <additionalJOption>-J-Xmx1024m</additionalJOption>
+        </configuration>
+      </plugin>
+      
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-release-plugin</artifactId>