<plugin>

                 <groupId>org.apache.maven.plugins</groupId>

                 <artifactId>maven-javadoc-plugin</artifactId>

                 <version>2.8</version>

                 <executions>

                     <execution>

                         <id>attach-javadocs</id>

                         <goals>

                             <goal>jar</goal>

                         </goals>

                         <configuration>

                             <failOnError>false</failOnError>

                         </configuration>

                     </execution>

                 </executions>

             </plugin>