<?php

namespace AppBundle\Migration;

use Doctrine\DBAL\Migrations\AbstractMigration;
use Doctrine\DBAL\Schema\Schema;

/**
 * Auto-generated Migration: Please modify to your needs!
 */
class Version20150810070728 extends AbstractMigration
{
    /**
     * @param Schema $schema
     */
    public function up(Schema $schema)
    {
        // this up() migration is auto-generated, please modify it to your needs
        $this->abortIf($this->connection->getDatabasePlatform()->getName() != 'mysql', 'Migration can only be executed safely on \'mysql\'.');

        $this->addSql('CREATE TABLE mail_templates (id INT AUTO_INCREMENT NOT NULL, alias VARCHAR(255) NOT NULL, subject VARCHAR(255) NOT NULL, content LONGTEXT NOT NULL, created_at DATETIME NOT NULL, updated_at DATETIME NOT NULL, UNIQUE INDEX UNIQ_17F263EDE16C6B94 (alias), PRIMARY KEY(id)) DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci ENGINE = InnoDB');
    }

    /**
     * @param Schema $schema
     */
    public function down(Schema $schema)
    {
        // this down() migration is auto-generated, please modify it to your needs
        $this->abortIf($this->connection->getDatabasePlatform()->getName() != 'mysql', 'Migration can only be executed safely on \'mysql\'.');

        $this->addSql('DROP TABLE mail_templates');
    }
}

Add migration for mail template
Add migration for mail template
