Add base files

src/main/java/com/university/chat/Server/FileManager.java

@@ -0,0 +1,25 @@
+package com.university.chat.Server;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+public class FileManager {
+
+    private static final String BASE_DIR = "server_data";
+
+    public static void createUserFolders(String username) throws IOException {
+        Path userPath = Paths.get(BASE_DIR, username);
+        Files.createDirectories(userPath.resolve("received"));
+        Files.createDirectories(userPath.resolve("sent"));
+    }
+
+    public static Path getReceivedPath(String username, String filename) {
+        return Paths.get(BASE_DIR, username, "received", filename);
+    }
+
+    public static Path getSentPath(String username, String filename) {
+        return Paths.get(BASE_DIR, username, "sent", filename);
+    }
+}