diff --git a/app/src/main/java/lightcontainer/storage/Repository.java b/app/src/main/java/lightcontainer/storage/Repository.java
index 778b979..d6f12bc 100644
--- a/app/src/main/java/lightcontainer/storage/Repository.java
+++ b/app/src/main/java/lightcontainer/storage/Repository.java
@@ -12,10 +12,10 @@ public class Repository {
 
     //static final String CONFIG_FILE_PATH = "../../resources/config.json";
 
-    void save(String filePath, Adapter adapter) {
+    static void save(String filePath, Adapter adapter) {
         if (filePath != null) {
             String jsonAppData = adapter.toString();
-            try (BufferedWriter bufferedWriter = Files.newBufferedWriter(Paths.get(filePath), StandardCharsets.UTF_8, StandardOpenOption.CREATE, StandardOpenOption.TRUNCATE_EXISTING)) {
+            try (BufferedWriter bufferedWriter = Files.newBufferedWriter(Paths.get(filePath).toAbsolutePath(), StandardCharsets.UTF_8, StandardOpenOption.CREATE, StandardOpenOption.TRUNCATE_EXISTING)) {
                 bufferedWriter.write(jsonAppData);
                 bufferedWriter.flush();
             } catch (IOException e) {
@@ -29,9 +29,9 @@ public class Repository {
         return adapter.fromString(jsonString);
     }
 
-    private String readFile(String filePath) {
+    static private String readFile(String filePath) {
         StringBuilder builder = new StringBuilder();
-        try (BufferedReader reader = Files.newBufferedReader(Paths.get(filePath), StandardCharsets.UTF_8)) {
+        try (BufferedReader reader = Files.newBufferedReader(Paths.get(filePath).toAbsolutePath(), StandardCharsets.UTF_8)) {
             while (reader.ready()) {
                 builder.append(reader.readLine());
             }
diff --git a/app/src/test/java/lightcontainer/storage/JsonAdapterTest.java b/app/src/test/java/lightcontainer/storage/JsonAdapterTests.java
similarity index 98%
rename from app/src/test/java/lightcontainer/storage/JsonAdapterTest.java
rename to app/src/test/java/lightcontainer/storage/JsonAdapterTests.java
index 2bde872..bd9006a 100644
--- a/app/src/test/java/lightcontainer/storage/JsonAdapterTest.java
+++ b/app/src/test/java/lightcontainer/storage/JsonAdapterTests.java
@@ -10,7 +10,7 @@ import java.util.Set;
 import static org.junit.jupiter.api.Assertions.*;
 
 
-public class JsonAdapterTest {
+public class JsonAdapterTests {
 
     @Test
     public void convertAppDataToJson() {
diff --git a/app/src/test/java/lightcontainer/storage/RepositoryTests.java b/app/src/test/java/lightcontainer/storage/RepositoryTests.java
new file mode 100644
index 0000000..0fa557a
--- /dev/null
+++ b/app/src/test/java/lightcontainer/storage/RepositoryTests.java
@@ -0,0 +1,56 @@
+package lightcontainer.storage;
+
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.InvalidPathException;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+
+public class RepositoryTests {
+
+    @AfterEach
+    public void destroyTestFile() {
+        try {
+            Files.deleteIfExists(Paths.get("src", "test", "resources", "test.json").toAbsolutePath());
+        } catch (IOException e) {
+            System.out.println("Error while destroying file");
+        }
+    }
+
+    @Test
+    public void save() {
+        //GIVEN an AppData instance, a JsonAdapter and a Repository
+        AppData appData = AppData.getInstance();
+        AppConfig appConfig = AppConfig.getInstance();
+        appConfig.setUnicastPort(32000);
+        appConfig.setMulticastIp("224.25.0.1");
+        appConfig.setMulticastPort(15502);
+        appConfig.setNetworkInterface("My network interface");
+        appConfig.setTls(false);
+        Map<String, File> files = new HashMap<>();
+        Set<String> storage = new HashSet<>();
+        storage.add("StorBackEnd1");
+        File file1 = new File("File1", 15, "8d8d8d8d", storage);
+        files.put(file1.getName(), file1);
+        User user1 = new User("User1", "Password", "djdjjdj", files);
+        appData.setAppConfig(appConfig);
+        appData.addUser(user1);
+        JsonAdapter jsonAdapter = new JsonAdapter(appData);
+        //WHEN Repository calls save method
+        String filePath = "src/test/resources/test.json";
+        Repository.save(filePath, jsonAdapter);
+        //THEN
+        assertTrue(Files.exists(Paths.get("src/test/resources/test.json").toAbsolutePath()));
+    }
+}