FileCollection pmdFileCollection = configuration

            tasks.register("myPmd", Pmd) {
                maxFailures = 0
                source = fileTree("\$projectDir/src/main")
                pmdClasspath = pmdFileCollection
                ruleSetFiles = files()
                ruleSets = ["category/java/errorprone.xml"]
                rulesMinimumPriority = 5
                targetJdk = TargetJdk.VERSION_1_4

        );
    }

    private void configureTaskConventionMapping(Configuration configuration, final Pmd task) {
        ConventionMapping taskMapping = task.getConventionMapping();
        taskMapping.map("pmdClasspath", () -> configuration);
        taskMapping.map("ruleSets", () -> extension.getRuleSets());
        taskMapping.map("ruleSetConfig", () -> extension.getRuleSetConfig());