need help with TFM's pom.xml

I'm trying to build TFM and get it into a .jar file, but there seems to be a problem with Intellij IDEA, Maven and the pom.xml file:

What do you guys think could be the cause of the error? I'm not very familiar with Maven lol
   <reporting>
       <!-- Checkstyle -->
       <plugins>
           <plugin>
               <groupId>org.apache.maven.plugins</groupId>
               <version>2.17</version> -- getting error here
               <artifactId>maven-checkstyle-plugin</artifactId> -- here as well
               <configuration>
                   <configLocation>checkstyle.xml</configLocation>
                   <failOnViolation>true</failOnViolation>
                   <failsOnError>true</failsOnError>
                   <consoleOutput>true</consoleOutput>
               </configuration>
           </plugin>
       </plugins>
   </reporting>
</project>