EnumType.php

<?php
namespace Acme\TestBundle\Types;

use Doctrine\DBAL\Types\Type;
use Doctrine\DBAL\Platforms\AbstractPlatform;

/**
 * My custom datatype.
 */
class EnumType extends Type
{
    const ENUM = 'enum'; // modify to match your type name

    public function getSqlDeclaration(array $fieldDeclaration, AbstractPlatform $platform)
    {
        return 'enum';
    }

    public function convertToPHPValue($value, AbstractPlatform $platform)
    {
        return new Enum($value);
    }

    public function convertToDatabaseValue($value, AbstractPlatform $platform)
    {
        return $value->toString();
    }

    public function getName()
    {
        return self::ENUM;
    }
}