Fix bugs reported by scrutinizer

libs/Tree/Builder.php

@@ -167,7 +167,7 @@ class Builder
     /**
      * @param Directory $parent
      * @param string $path
-     * @return Content
+     * @return ContentAbstract
      */
     public static function getOrCreatePage(Directory $parent, $path)
     {

libs/Tree/ComputedRaw.php

@@ -1,23 +1,5 @@
 <?php namespace Todaymade\Daux\Tree;
 
-class ComputedRaw extends Entry
+class ComputedRaw extends ContentAbstract
 {
-    /** @var string */
-    protected $content;
-
-    /**
-     * @return string
-     */
-    public function getContent()
-    {
-        return $this->content;
-    }
-
-    /**
-     * @param string $content
-     */
-    public function setContent($content)
-    {
-        $this->content = $content;
-    }
 }

libs/Tree/Content.php

@@ -2,7 +2,7 @@
 
 use Webuni\FrontMatter\FrontMatter;
 
-class Content extends Entry
+class Content extends ContentAbstract
 {
     /** @var string */
     protected $content;

libs/Tree/ContentAbstract.php

@@ -0,0 +1,24 @@
+<?php namespace Todaymade\Daux\Tree;
+
+
+abstract class ContentAbstract extends Entry
+{
+    /** @var string */
+    protected $content;
+
+    /**
+     * @return string
+     */
+    public function getContent()
+    {
+        return $this->content;
+    }
+
+    /**
+     * @param string $content
+     */
+    public function setContent($content)
+    {
+        $this->content = $content;
+    }
+}