diff --git a/source/src/main/java/one/nem/lacerta/source/file/impl/FileManagerImpl.java b/source/src/main/java/one/nem/lacerta/source/file/impl/FileManagerImpl.java
index 1c238d06..a5e9ca4a 100644
--- a/source/src/main/java/one/nem/lacerta/source/file/impl/FileManagerImpl.java
+++ b/source/src/main/java/one/nem/lacerta/source/file/impl/FileManagerImpl.java
@@ -185,6 +185,15 @@ public class FileManagerImpl implements FileManager {
             throw new IOException("Failed to save xml");
         }
     }
+    private void saveBitmapInternal(Bitmap bitmap) throws IOException {
+        try {
+            File file = this.path.toFile();
+            bitmap.compress(Bitmap.CompressFormat.PNG, 100, Files.newOutputStream(file.toPath()));
+        } catch (Exception e) {
+            logger.error("saveBitmapInternal", e.getMessage());
+            throw new IOException("Failed to save bitmap");
+        }
+    }
 
     @Override
     public void saveXml(Document document, String fileName) throws IOException {