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 b9c39de8..ed011f9c 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
@@ -34,21 +34,13 @@ public class FileManagerImpl implements FileManager {
 
     // Injection
     private final LacertaLogger logger;
+
     @AssistedInject
     public FileManagerImpl(LacertaLogger logger, @Assisted Path rootDir) {
         this.logger = logger;
         this.rootDir = rootDir;
     }
 
-    // for generate new instance
-    public FileManagerImpl(LacertaLogger logger, Path rootDir, Path path, boolean autoCreateParent, boolean disableRootDirCheck) {
-        this.logger = logger;
-        this.rootDir = rootDir;
-        this.path = path;
-        this.autoCreateParent = autoCreateParent;
-        this.disableRootDirCheck = disableRootDirCheck;
-    }
-
     // Internal
     private Path resolveStringPath(String path) throws IOException{
         String[] pathArray = path.split("/");
@@ -69,11 +61,6 @@ public class FileManagerImpl implements FileManager {
         return resolvedPath;
     }
 
-    private FileManager newInstance(Path rootDir, Path path, boolean autoCreateParent, boolean disableRootDirCheck) {
-        logger.debug("newInstance", "Generating new instance");
-        return new FileManagerImpl(this.logger, rootDir, path, autoCreateParent, disableRootDirCheck);
-    }
-
     @Override
     public File getFileRef() {
         if (this.isExist()) {