doctrine orm:schema-tool:create
    Creating database schema...
    Database schema created successfully!

public function getConnection() {
   if ($this->connection === null) {
       $dbname = 'erms_test';
       if (self::$pdo == null) {
          $user = 'root';
          $password = 'password';
          self::$pdo = new PDO("sqlite:dbname=$dbname;host=localhost", $user, $password);
       }
       $this->connection = $this->createDefaultDBConnection(self::$pdo, $dbname);
    }
    return $this->connection;
}