Made the write method protected

Tests are not a good reason to make it public.

tests/Monolog/TestCase.php

@@ -0,0 +1,40 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Monolog;
+
+class TestCase extends \PHPUnit_Framework_TestCase
+{
+    protected function getRecord($level = Logger::WARNING, $message = 'test')
+    {
+        return array(
+            'message' => $message,
+            'level' => $level,
+            'level_name' => Logger::getLevelName($level),
+            'channel' => 'test',
+            'datetime' => new \DateTime(),
+            'extra' => array(),
+        );
+    }
+
+    /**
+     * @return Monolog\Formatter\FormatterInterface
+     */
+    protected function getIdentityFormatter()
+    {
+        $formatter = $this->getMock('Monolog\\Formatter\\FormatterInterface');
+        $formatter->expects($this->any())
+            ->method('format')
+            ->will($this->returnArgument(0));
+
+        return $formatter;
+    }
+}