Add javadoc-plugin to pom

pom.xml

@@ -194,6 +194,35 @@
             </lifecycleMappingMetadata>
           </configuration>
         </plugin>
+
+        <plugin>
+          <groupId>org.apache.maven.plugins</groupId>
+          <artifactId>maven-javadoc-plugin</artifactId>
+          <version>2.9.1</version>
+          <configuration>
+            <source>1.8</source>
+            <doclet>org.avaje.doclet.PygmentsDoclet</doclet>
+            <docletArtifact>
+              <groupId>org.avaje</groupId>
+              <artifactId>pygments-doclet</artifactId>
+              <version>1.0.0</version>
+            </docletArtifact>
+            <additionalparam>
+              -Xdoclint:none
+            </additionalparam>
+            <linksource>true</linksource>
+          </configuration>
+
+          <executions>
+            <execution>
+              <id>attach-javadocs</id>
+              <goals>
+                <goal>jar</goal>
+              </goals>
+            </execution>
+          </executions>
+        </plugin>
+        
       </plugins>
     </pluginManagement>
   </build>