Mark internal classes with internal

API of internal classes is not guaranteed,
interfaces are allowed to be broken without major version bump.

Author: glensc

src/ProfilerFactory.php

@@ -5,6 +5,9 @@
 use Xhgui\Profiler\Exception\ProfilerException;
 use Xhgui\Profiler\Profilers\ProfilerInterface;
 
+/**
+ * @internal
+ */
 final class ProfilerFactory
 {
     /**

src/ProfilingData.php

@@ -2,6 +2,9 @@
 
 namespace Xhgui\Profiler;
 
+/**
+ * @internal
+ */
 final class ProfilingData
 {
     /** @var array */

src/SaverFactory.php

@@ -7,6 +7,9 @@
 use Xhgui_Saver;
 use Xhgui_Saver_Interface;
 
+/**
+ * @internal
+ */
 final class SaverFactory
 {
     /**