PHPMD Symfony base class

Symfony2BarRule.php

<?php
class My_Custom_Symfony2BarRule extends My_Custom_Symfony2BaseRule
{
    protected function doApply($class) {}
}

Symfony2BaseRule.php

<?php

abstract class My_Custom_Symfony2BaseRule extends PHP_PMD_Rule implements PHP_PMD_Rule_IClassAware
{
    public final function apply($class)
    {
        if ($this->isController($class)) {
            $this->doApply($class);
        }
    }

    protected abstract function doApply($class);

    protected function isController($class)
    {
        foreach ($class->getInterfaces() as $interface)
        {
            if ($interface->getName() === 'ControllerInterface) {
                return true;
            }
        }    
        return false;
    }
}

Symfony2FooRule.php

<?php
class My_Custom_Symfony2FooRule extends My_Custom_Symfony2BaseRule
{
    protected function doApply($class) {}
}