diff --git a/caches/FileCache.php b/caches/FileCache.php
index fc152b1..7878d34 100644
--- a/caches/FileCache.php
+++ b/caches/FileCache.php
@@ -2,7 +2,9 @@
 /**
 * Cache with file system
 */
-class FileCache extends CacheAbstract {
+class FileCache implements CacheInterface {
+
+	protected $param;
 
 	public function loadData(){
 		$this->isPrepareCache();
@@ -53,6 +55,12 @@ class FileCache extends CacheAbstract {
 		}
 	}
 
+	public function prepare(array $param){
+		$this->param = $param;
+
+		return $this;
+	}
+
 	/**
 	* Cache is prepared ?
 	* Note : Cache name is based on request information, then cache must be prepare before use
diff --git a/lib/BridgeAbstract.php b/lib/BridgeAbstract.php
index 2a64832..90e997c 100644
--- a/lib/BridgeAbstract.php
+++ b/lib/BridgeAbstract.php
@@ -196,7 +196,7 @@ abstract class BridgeAbstract implements BridgeInterface {
 		return static::URI;
 	}
 
-	public function setCache(\CacheAbstract $cache){
+	public function setCache(\CacheInterface $cache){
 		$this->cache = $cache;
 	}
 }
diff --git a/lib/CacheAbstract.php b/lib/CacheAbstract.php
deleted file mode 100644
index e6c39d8..0000000
--- a/lib/CacheAbstract.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-require_once(__DIR__ . '/CacheInterface.php');
-abstract class CacheAbstract implements CacheInterface {
-	protected $param;
-
-	public function prepare(array $param){
-		$this->param = $param;
-
-		return $this;
-	}
-}
diff --git a/lib/RssBridge.php b/lib/RssBridge.php
index 0052abc..37992d3 100644
--- a/lib/RssBridge.php
+++ b/lib/RssBridge.php
@@ -14,7 +14,6 @@ require __DIR__ . '/Bridge.php';
 require __DIR__ . '/BridgeAbstract.php';
 require __DIR__ . '/FeedExpander.php';
 require __DIR__ . '/Cache.php';
-require __DIR__ . '/CacheAbstract.php';
 
 require __DIR__ . '/validation.php';
 require __DIR__ . '/html.php';