diff --git a/app/src/main/java/xdsopl/robot36/BaseMode.java b/app/src/main/java/xdsopl/robot36/BaseMode.java
index fba5f8d..78b0327 100644
--- a/app/src/main/java/xdsopl/robot36/BaseMode.java
+++ b/app/src/main/java/xdsopl/robot36/BaseMode.java
@@ -1,3 +1,9 @@
+/*
+Base class for all modes
+
+Copyright 2025 Marek Ossowski <marek0ossowski@gmail.com>
+*/
+
 package xdsopl.robot36;
 
 import android.graphics.Bitmap;
diff --git a/app/src/main/java/xdsopl/robot36/HFFax.java b/app/src/main/java/xdsopl/robot36/HFFax.java
index 3164a75..b4dc7ac 100644
--- a/app/src/main/java/xdsopl/robot36/HFFax.java
+++ b/app/src/main/java/xdsopl/robot36/HFFax.java
@@ -1,3 +1,9 @@
+/*
+HF Fax mode
+
+Copyright 2025 Marek Ossowski <marek0ossowski@gmail.com>
+*/
+
 package xdsopl.robot36;
 
 import android.graphics.Bitmap;