diff --git a/phpBB/includes/auth/provider_apache.php b/phpBB/includes/auth/provider_apache.php
index 054316db19..5f6f2862b6 100644
--- a/phpBB/includes/auth/provider_apache.php
+++ b/phpBB/includes/auth/provider_apache.php
@@ -42,6 +42,9 @@ class phpbb_auth_provider_apache implements phpbb_auth_provider_interface
 		$this->php_ext = $php_ext;
 	}
 
+	/**
+	 * {@inheritdoc}
+	 */
 	public function init()
 	{
 		if (!$this->request->is_set('PHP_AUTH_USER', phpbb_request_interface::SERVER) || $this->user->data['username'] !== htmlspecialchars_decode($this->request->server('PHP_AUTH_USER')))
@@ -51,6 +54,9 @@ class phpbb_auth_provider_apache implements phpbb_auth_provider_interface
 		return false;
 	}
 
+	/**
+	 * {@inheritdoc}
+	 */
 	public function login($username, $password)
 	{
 		// do not allow empty password
@@ -138,6 +144,9 @@ class phpbb_auth_provider_apache implements phpbb_auth_provider_interface
 		);
 	}
 
+	/**
+	 * {@inheritdoc}
+	 */
 	public function autologin()
 	{
 		if (!$this->request->is_set('PHP_AUTH_USER', phpbb_request_interface::SERVER))
@@ -226,6 +235,9 @@ class phpbb_auth_provider_apache implements phpbb_auth_provider_interface
 		);
 	}
 
+	/**
+	 * {@inheritdoc}
+	 */
 	public function validate_session($user)
 	{
 		// Check if PHP_AUTH_USER is set and handle this case
@@ -245,11 +257,17 @@ class phpbb_auth_provider_apache implements phpbb_auth_provider_interface
 		return false;
 	}
 
+	/**
+	 * {@inheritdoc}
+	 */
 	public function acp($new)
 	{
 		return;
 	}
 
+	/**
+	 * {@inheritdoc}
+	 */
 	public function logout($data, $new_session)
 	{
 		return;
diff --git a/phpBB/includes/auth/provider_db.php b/phpBB/includes/auth/provider_db.php
index e8fff26650..a79d031048 100644
--- a/phpBB/includes/auth/provider_db.php
+++ b/phpBB/includes/auth/provider_db.php
@@ -45,11 +45,17 @@ class phpbb_auth_provider_db implements phpbb_auth_provider_interface
 		$this->php_ext = $php_ext;
 	}
 
+	/**
+	 * {@inheritdoc}
+	 */
 	public function init()
 	{
 		return;
 	}
 
+	/**
+	 * {@inheritdoc}
+	 */
 	public function login($username, $password)
 	{
 		// Auth plugins get the password untrimmed.
@@ -297,21 +303,33 @@ class phpbb_auth_provider_db implements phpbb_auth_provider_interface
 		);
 	}
 
+	/**
+	 * {@inheritdoc}
+	 */
 	public function autologin()
 	{
 		return;
 	}
 
+	/**
+	 * {@inheritdoc}
+	 */
 	public function acp($new)
 	{
 		return;
 	}
 
+	/**
+	 * {@inheritdoc}
+	 */
 	public function logout($data, $new_session)
 	{
 		return;
 	}
 
+	/**
+	 * {@inheritdoc}
+	 */
 	public function validate_session($user)
 	{
 		return;
diff --git a/phpBB/includes/auth/provider_ldap.php b/phpBB/includes/auth/provider_ldap.php
index 2140e7dd63..f67c1e9247 100644
--- a/phpBB/includes/auth/provider_ldap.php
+++ b/phpBB/includes/auth/provider_ldap.php
@@ -38,6 +38,9 @@ class phpbb_auth_provider_ldap implements phpbb_auth_provider_interface
 		$this->user = $user;
 	}
 
+	/**
+	 * {@inheritdoc}
+	 */
 	public function init()
 	{
 		if (!@extension_loaded('ldap'))
@@ -106,6 +109,9 @@ class phpbb_auth_provider_ldap implements phpbb_auth_provider_interface
 		return false;
 	}
 
+	/**
+	 * {@inheritdoc}
+	 */
 	public function login($username, $password)
 	{
 		// do not allow empty password
@@ -277,11 +283,17 @@ class phpbb_auth_provider_ldap implements phpbb_auth_provider_interface
 		);
 	}
 
+	/**
+	 * {@inheritdoc}
+	 */
 	public function autologin()
 	{
 		return;
 	}
 
+	/**
+	 * {@inheritdoc}
+	 */
 	public function acp($new)
 	{
 		$tpl = '
@@ -356,11 +368,17 @@ class phpbb_auth_provider_ldap implements phpbb_auth_provider_interface
 		return str_replace(array('*', '\\', '(', ')'), array('\\*', '\\\\', '\\(', '\\)'), $string);
 	}
 
+	/**
+	 * {@inheritdoc}
+	 */
 	public function logout($data, $new_session)
 	{
 		return;
 	}
 
+	/**
+	 * {@inheritdoc}
+	 */
 	public function validate_session($user)
 	{
 		return;