Kohana Bootstrap (comment less, clean version)

bootstrap.php

<?php defined('SYSPATH') or die('No direct script access.');

class Bootstrap
{
    public static function run()
    {
        self::loadKohanaCore();
        self::loadKohanaExtension();
        self::setDefaultTimezone();
        self::setDefaultLocale();
        self::enableKohanaAutoloader();
        self::enableKohanaUnserializer();
        self::setDefaultLanguage();
        self::setKohanaEnvironment();
        self::initKohana();
        self::initLogWriter();
        self::initConfigReader();
        self::initModules();
        self::initRoutes();
    }

    public static function loadKohanaCore()
    {
        require SYSPATH . 'classes/kohana/core' . EXT;
    }

    public static function loadKohanaExtension()
    {
        if (is_file(APPPATH . 'classes/kohana' . EXT)) {
            require APPPATH . 'classes/kohana' . EXT;
        } else {
            require SYSPATH . 'classes/kohana' . EXT;
        }
    }

    public static function setDefaultTimezone($timezone = 'America/Chicago')
    {
        date_default_timezone_set($timezone);
    }

    public static function setDefaultLocale()
    {
        setlocale(LC_ALL, 'en_US.utf-8');
    }

    public static function enableKohanaAutoloader()
    {
        spl_autoload_register(array ('Kohana', 'auto_load'));
    }

    public static function enableKohanaUnserializer()
    {
        ini_set('unserialize_callback_func', 'spl_autoload_call');
    }

    public static function setDefaultLanguage($lang = 'en-us')
    {
        I18n::lang($lang);
    }

    public static function setKohanaEnvironment()
    {
        if (isset($_SERVER['KOHANA_ENV'])) {
            Kohana::$environment = constant('Kohana::' . strtoupper($_SERVER['KOHANA_ENV']));
        }
    }

    public static function initKohana()
    {
        Kohana::init(array(
            'base_url'   => '/',
        ));
    }

    public static function initLogWriter()
    {
        Kohana::$log->attach(new Log_File(APPPATH . 'logs'));
    }

    public static function initConfigReader()
    {
        Kohana::$config->attach(new Config_File);
    }

    public static function initModules()
    {
        Kohana::modules(array (
            'auth'       => MODPATH . 'auth',       // Basic authentication
            'cache'      => MODPATH . 'cache',      // Caching with multiple backends
            'codebench'  => MODPATH . 'codebench',  // Benchmarking tool
            'database'   => MODPATH . 'database',   // Database access
            'image'      => MODPATH . 'image',      // Image manipulation
            'orm'        => MODPATH . 'orm',        // Object Relationship Mapping
            'unittest'   => MODPATH . 'unittest',   // Unit testing
            'userguide'  => MODPATH . 'userguide',  // User guide and API documentation
        ));
    }

    public static function initRoutes()
    {
        Route::set('default', '(<controller>(/<action>(/<id>)))')->defaults(array(
            'controller' => 'welcome',
            'action'     => 'index',
        ));
    }
}

Bootstrap::run();