diff --git a/src/CopyrighFixer/CopyrighFixer/interfaceimplem.cpp b/src/CopyrighFixer/CopyrighFixer/interfaceimplem.cpp
new file mode 100644
index 0000000..9b659dd
--- /dev/null
+++ b/src/CopyrighFixer/CopyrighFixer/interfaceimplem.cpp
@@ -0,0 +1,28 @@
+//#
+//# 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 "interfaceimplem.h"
+
+namespace CopyrighFixer {
+
+InterfaceImplem::InterfaceImplem() {
+
+}
+
+bool InterfaceImplem::read(const QString &pathToFile, Signature &objSign) {
+
+}
+
+bool InterfaceImplem::write(const QString &pathToFile, const Signature &objSign) {
+
+}
+
+Extension InterfaceImplem::supportsExtensions() const {
+
+}
+
+};
diff --git a/src/CopyrighFixer/CopyrighFixer/interfaceimplem.h b/src/CopyrighFixer/CopyrighFixer/interfaceimplem.h
new file mode 100644
index 0000000..9c6cb75
--- /dev/null
+++ b/src/CopyrighFixer/CopyrighFixer/interfaceimplem.h
@@ -0,0 +1,32 @@
+//#
+//# 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 INTERFACEIMPLEM_H
+#define INTERFACEIMPLEM_H
+
+#include "CopyrighFixer_global.h"
+#include "CopyrighFixer/ifilemanager.h"
+
+
+namespace CopyrighFixer {
+
+
+class CopyrighFixer_EXPORT InterfaceImplem: public IFileManager {
+public:
+    InterfaceImplem();
+
+    bool read(const QString &pathToFile, Signature &objSign);
+
+    bool write(const QString &pathToFile, const Signature &objSign);
+
+    Extension supportsExtensions() const;
+
+};
+
+};
+
+#endif // INTERFACEIMPLEM_H
diff --git a/src/CopyrighFixer/interfaceimplem.cpp b/src/CopyrighFixer/interfaceimplem.cpp
new file mode 100644
index 0000000..a4f4629
--- /dev/null
+++ b/src/CopyrighFixer/interfaceimplem.cpp
@@ -0,0 +1,6 @@
+#include "interfaceimplem.h"
+
+InterfaceImplem::InterfaceImplem()
+{
+
+}
diff --git a/src/CopyrighFixer/interfaceimplem.h b/src/CopyrighFixer/interfaceimplem.h
new file mode 100644
index 0000000..25ca8ae
--- /dev/null
+++ b/src/CopyrighFixer/interfaceimplem.h
@@ -0,0 +1,11 @@
+#ifndef INTERFACEIMPLEM_H
+#define INTERFACEIMPLEM_H
+
+
+class InterfaceImplem
+{
+public:
+    InterfaceImplem();
+};
+
+#endif // INTERFACEIMPLEM_H
diff --git a/tests/tstMain.cpp b/tests/tstMain.cpp
index 953871b..7975049 100644
--- a/tests/tstMain.cpp
+++ b/tests/tstMain.cpp
@@ -10,6 +10,7 @@
 #include "signtest.h"
 #include "signertest.h"
 #include "configparsertest.h"
+#include "interfaceimplemtest.h"
 
 // Use This macros for initialize your own test classes.
 // Check exampletests
@@ -37,6 +38,7 @@ private slots:
     TestCase(signTest, SignTest);
     TestCase(signerTest, SignerTest);
     TestCase(configParserTest, ConfigParserTest)
+    TestCase(interfaceImplemTest, InterfaceImplemTest)
     // END TEST CASES
 
 private:
diff --git a/tests/units/interfaceimplemtest.cpp b/tests/units/interfaceimplemtest.cpp
new file mode 100644
index 0000000..8de1a0a
--- /dev/null
+++ b/tests/units/interfaceimplemtest.cpp
@@ -0,0 +1,33 @@
+//#
+//# Copyright (C) 2020-2021 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 "interfaceimplemtest.h"
+
+InterfaceImplemTest::InterfaceImplemTest() {
+
+}
+
+InterfaceImplemTest::~InterfaceImplemTest() {
+
+}
+
+void InterfaceImplemTest::test() {
+    testIntesfaceImplem();
+}
+
+void InterfaceImplemTest::testReadSign() {
+    QVERIFY(true);
+}
+
+void InterfaceImplemTest::testWriteSign() {
+    QVERIFY(true);
+}
+
+void InterfaceImplemTest::testIntesfaceImplem() {
+    testReadSign();
+    testWriteSign();
+}
diff --git a/tests/units/interfaceimplemtest.h b/tests/units/interfaceimplemtest.h
new file mode 100644
index 0000000..12a1353
--- /dev/null
+++ b/tests/units/interfaceimplemtest.h
@@ -0,0 +1,28 @@
+//#
+//# Copyright (C) 2020-2021 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 INTERFACEIMPLEMTEST_H
+#define INTERFACEIMPLEMTEST_H
+#include "test.h"
+#include "testutils.h"
+#include "CopyrighFixer/interfaceimplem.h"
+
+#include <QTest>
+
+class InterfaceImplemTest: public Test, protected TestUtils {
+public:
+    InterfaceImplemTest();
+    ~InterfaceImplemTest();
+
+    void test();
+
+    void testReadSign();
+    void testWriteSign();
+    void testIntesfaceImplem();
+};
+
+#endif // INTERFACEIMPLEMTEST_H