Flag missing @Override as error in Error Prone

artemis-selector/pom.xml

@@ -55,6 +55,16 @@
          </resource>
       </resources>
       <plugins>
+         <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-compiler-plugin</artifactId>
+            <configuration>
+               <compilerArgs>
+                  <!-- TODO: do this only for generated-sources -->
+                  <arg>-Xep:MissingOverride:WARN</arg>
+               </compilerArgs>
+            </configuration>
+         </plugin>
          <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>javacc-maven-plugin</artifactId>

pom.xml

@@ -930,6 +930,7 @@
                  <forceJavacCompilerUse>true</forceJavacCompilerUse>
                  <compilerId>${javac-compiler-id}</compilerId>
                  <compilerArgs>
+                    <arg>-Xep:MissingOverride:ERROR</arg>
                     <arg>-Xep:NonAtomicVolatileUpdate:ERROR</arg>
                     <arg>-Xep:SynchronizeOnNonFinalField:ERROR</arg>
                     <arg>-Xep:StaticAccessedFromInstance:ERROR</arg>