diff --git a/src/CopyrighFixer/CopyrighFixer/ifilemanager.cpp b/src/CopyrighFixer/CopyrighFixer/ifilemanager.cpp
new file mode 100644
index 0000000..e73d2a6
--- /dev/null
+++ b/src/CopyrighFixer/CopyrighFixer/ifilemanager.cpp
@@ -0,0 +1,17 @@
+//#
+//# Copyright (C) 2021-2021 QuasarApp.
+//# Distributed under the lgplv3 software license, see the accompanying
+//# Everyone is permitted to copy and distribute verbatim copies
+//# of this license document, but changing it is not allowed.
+//#
+
+#include "ifilemanager.h"
+
+
+namespace CopyrighFixer {
+
+IFileManager::~IFileManager() {
+
+}
+
+};
diff --git a/src/CopyrighFixer/CopyrighFixer/ifilemanager.h b/src/CopyrighFixer/CopyrighFixer/ifilemanager.h
new file mode 100644
index 0000000..e169a30
--- /dev/null
+++ b/src/CopyrighFixer/CopyrighFixer/ifilemanager.h
@@ -0,0 +1,71 @@
+//#
+//# Copyright (C) 2021-2021 QuasarApp.
+//# Distributed under the lgplv3 software license, see the accompanying
+//# Everyone is permitted to copy and distribute verbatim copies
+//# of this license document, but changing it is not allowed.
+//#
+
+#ifndef IFILEHANDLER_H
+#define IFILEHANDLER_H
+
+#include "CopyrighFixer_global.h"
+#include "CopyrighFixer/sign.h"
+
+
+namespace CopyrighFixer {
+
+/**
+ * @brief The Extensinon enum File extensions for signature.
+ * @param CPP The CPP file is a source code file written in C++.
+ * @param HPP The header file containing the development source code written in C ++.
+ * @param H   The used for the header of the file, which is referenced by the source code of the document written in C ++.
+ * @param CC  The CC file is a source code file written in C++.
+ * @param QML The Contains JavaScript-based QML source code encoded in UTF-8 format.
+ * @param PRO The PRO files include references to project libraries, assets and source code files, and other files such as application resources.
+ * @param TXT The source code is written in the txt file in CMake language.
+ * @param Py  The py file contains the source code in python.
+ */
+enum Extensinon {
+    CPP,
+    HPP,
+    H,
+    CC,
+    QML,
+    PRO,
+    TXT,
+    PY,
+};
+
+/**
+ * @brief The IFileHandler class This is class that handles the source files that need to be signed.
+ */
+class CopyrighFixer_EXPORT IFileManager {
+public:
+
+    /**
+     * @brief read This is method be read a copyright singnature from a source file.
+     * @param pathToFile The source file path.
+     * @param objSign The object signature.
+     * @return Returns true if the file was read successfully.
+     */
+    virtual bool read(const QString &pathToFile, Signature &objSign) = 0;
+
+    /**
+     * @brief write This is method be write a new copyright signature into file (replace an old signature).
+     * @param pathToFile Path to the file in which to replace the signature.
+     * @param objSign The object signature.
+     * @return Returns true if the signature is valid.
+     */
+    virtual bool write(const QString &pathToFile, const Signature &objSign) = 0;
+
+    /**
+     * @brief supportsExtensions This method contains a list of file extensions that will be checked against the source files.
+     * @return Return A set of the supported extensions.
+     */
+    virtual Extensinon supportsExtensions() = 0;
+
+    virtual ~IFileManager();
+};
+
+};
+#endif // IFILEHANDLER_H