Add javadoc plugin

Author: kmozsi

pom.xml

@@ -140,7 +140,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-source-plugin</artifactId>
-                <version>3.0.1</version>
+                <version>3.1.0</version>
                 <executions>
                     <execution>
                         <id>attach-sources</id>
@@ -150,6 +150,20 @@
                     </execution>
                 </executions>
             </plugin>
+            
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+                <version>3.1.1</version>
+                <executions>
+                    <execution>
+                        <id>attach-javadocs</id>
+                        <goals>
+                            <goal>jar</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
 
         </plugins>
 
@@ -187,4 +201,4 @@
         </profile>
     </profiles>
 
-</project>
+</project>