diff --git a/source/src/main/java/one/nem/lacerta/source/file/FileManager.java b/source/src/main/java/one/nem/lacerta/source/file/FileManager.java
index 30a89143..90a2b2f1 100644
--- a/source/src/main/java/one/nem/lacerta/source/file/FileManager.java
+++ b/source/src/main/java/one/nem/lacerta/source/file/FileManager.java
@@ -20,6 +20,10 @@ public interface FileManager {
     File createFile(String fileName);
     void removeFile(String fileName);
 
+    boolean isExist(Path path);
+
+    void autoCreateDir(Path path);
+
     void saveBitmapAtCurrent(Bitmap bitmap, String fileName);
     Bitmap loadBitmap(Path path);
     void removeBitmap(Path path);