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 79ed23d8..908b6c9c 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
@@ -12,5 +12,15 @@ import java.util.List;
 /** @noinspection unused*/
 public interface FileManager {
 
+    File getFileRef();
+    boolean isExist();
+    boolean isDirectory();
+    boolean isFile();
+    boolean isWritable();
+    boolean isReadable();
+    Document readXml();
 
+    FileManager setRootDir(Path rootDir);
+    FileManager setPath(Path path);
+    FileManager setPath(String path);
 }