Adding descriptions

src/Core/Config/ConfigCache.php

@@ -2,6 +2,13 @@
 
 namespace Friendica\Core\Config;
 
+/**
+ * The Friendica config cache for the application
+ * Initial, all *.config.php files are loaded into this cache with the
+ * ConfigCacheLoader ( @see ConfigCacheLoader )
+ *
+ * Is used for further caching operations too (depending on the ConfigAdapter )
+ */
 class ConfigCache implements IConfigCache, IPConfigCache
 {
 	/**
@@ -12,12 +19,15 @@ class ConfigCache implements IConfigCache, IPConfigCache
 	 */
 	public $config;
 
-	public function __construct($config = [], $overwrite = false)
+	/**
+	 * @param array $config    A initial config array
+	 */
+	public function __construct($config = [])
 	{
 		$this->config = [];
 
 		if (isset($config)) {
-			$this->loadConfigArray($config, $overwrite);
+			$this->loadConfigArray($config, true);
 		}
 	}
 

src/Core/Config/ConfigCacheLoader.php

@@ -2,15 +2,29 @@
 
 namespace Friendica\Core\Config;
 
+/**
+ * The ConfigCacheLoader loads config-files and stores them in a ConfigCache ( @see ConfigCache )
+ *
+ * It is capable of loading the following config files:
+ * - *.config.php   (current)
+ * - *.ini.php      (deprecated)
+ * - *.htconfig.php (deprecated)
+ */
 class ConfigCacheLoader
 {
+	/**
+	 * The Sub directory of the config-files
+	 * @var string
+	 */
+	const SUBDIRECTORY = '/config/';
+
 	private $baseDir;
 	private $configDir;
 
 	public function __construct($baseDir)
 	{
 		$this->baseDir = $baseDir;
-		$this->configDir = $baseDir . '/config/';
+		$this->configDir = $baseDir . self::SUBDIRECTORY;
 	}
 
 	/**

src/Core/Config/IConfigCache.php

@@ -2,6 +2,9 @@
 
 namespace Friendica\Core\Config;
 
+/**
+ * The interface for a system-wide ConfigCache
+ */
 interface IConfigCache
 {
 	/**

src/Core/Config/IPConfigCache.php

@@ -2,6 +2,9 @@
 
 namespace Friendica\Core\Config;
 
+/**
+ * The interface for a user-specific config cache
+ */
 interface IPConfigCache
 {
 	/**