Can't compile using Maven 3.3.9

[adamwight]

This looks like a great tool, and I'd like to use it but lack the Java foo. So far, I tried "mvn compile" and "mvn package", but no sources are build. When I apply the following patch,

--- a/pom.xml
+++ b/pom.xml
@@ -45,4 +45,11 @@
             <version>2.5.3</version>
         </dependency>
     </dependencies>
+    <build>
+        <sourceDirectory>src</sourceDirectory>
+    </build>
+    <properties>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+    </properties>
 </project>

The next error is:

[ERROR] Bad service configuration file, or exception thrown while constructing Processor object: javax.annotation.processing.Processor: Provider org.kohsuke.args4j.apt.AnnotationProcessorImpl could not be instantiated: java.lang.NullPointerException

However, I'd like to check with you before digging any further, I assume I'm just not running the right command or version of Maven or JDK? Thanks!