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 258c0a0d..30a89143 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
@@ -2,6 +2,7 @@ package one.nem.lacerta.source.file;
 
 import android.graphics.Bitmap;
 
+import java.io.File;
 import java.nio.file.Path;
 import java.util.List;
 
@@ -16,6 +17,9 @@ public interface FileManager {
     void createDir(String dirName);
     void removeDir(String dirName);
 
+    File createFile(String fileName);
+    void removeFile(String fileName);
+
     void saveBitmapAtCurrent(Bitmap bitmap, String fileName);
     Bitmap loadBitmap(Path path);
     void removeBitmap(Path path);
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 c986f72a..ea105a24 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
@@ -14,6 +14,8 @@ import dagger.assisted.Assisted;
 import dagger.assisted.AssistedInject;
 import one.nem.lacerta.source.file.FileManager;
 
+import one.nem.lacerta.utils.LacertaLogger;
+
 public class FileManagerImpl implements FileManager {
 
     // RootDir
@@ -32,8 +34,12 @@ public class FileManagerImpl implements FileManager {
         }
     }
 
+    // Injection
+    private LacertaLogger logger;
+
     @AssistedInject
-    public FileManagerImpl(@Assisted Path rootDir) {
+    public FileManagerImpl(LacertaLogger logger, @Assisted Path rootDir) {
+        this.logger = logger;
         this.rootDir = rootDir;
         this.currentDir = rootDir;
     }
@@ -73,6 +79,7 @@ public class FileManagerImpl implements FileManager {
 
     @Override
     public void createDir(String dirName) {
+        //ディレクトリ作成
         currentDir.resolve(dirName).toFile().mkdir(); // TODO-rca: エラーハンドリング
     }
 
@@ -81,6 +88,17 @@ public class FileManagerImpl implements FileManager {
         currentDir.resolve(dirName).toFile().delete(); // TODO-rca: エラーハンドリング
     }
 
+    @Override
+    public File createFile(String fileName) {
+        return currentDir.resolve(fileName).toFile();
+    }
+
+    @Override
+    public void removeFile(String fileName) {
+        currentDir.resolve(fileName).toFile().delete(); // TODO-rca: エラーハンドリング
+    }
+
+
     @Override
     public void saveBitmapAtCurrent(Bitmap bitmap, String fileName) { // TODO-rca: ファイル形式を変更できるようにする？
         try {