diff --git a/feature/library/src/main/java/one/nem/lacerta/feature/library/LibraryFolderFragment.java b/feature/library/src/main/java/one/nem/lacerta/feature/library/LibraryFolderFragment.java
index 115de484..731dcfe3 100644
--- a/feature/library/src/main/java/one/nem/lacerta/feature/library/LibraryFolderFragment.java
+++ b/feature/library/src/main/java/one/nem/lacerta/feature/library/LibraryFolderFragment.java
@@ -8,25 +8,27 @@ import java.util.List;
 import java.util.Map;
 
 import one.nem.lacerta.model.document.DocumentMeta;
+
 //フォルダ管理機能
-public class LibraryFolderFragment extends Fragment{
+public class LibraryFolderFragment extends Fragment {
 
-        private Map<String, List<DocumentMeta>> folderMap;
+    private Map<String, List<DocumentMeta>> folderMap;
 
-        public LibraryFolderFragment() {
-            folderMap = new HashMap<>();
-        }
-
-        public void addDocumentToFolder(String folderName, DocumentMeta documentMeta) {
-            if (!folderMap.containsKey(folderName)) {
-                folderMap.put(folderName, new ArrayList<>());
-            }
-
-            List<DocumentMeta> documents = folderMap.get(folderName);
-            documents.add(documentMeta);
-        }
-        //フォルダに関連するドキュメントを取得するためのメソッド
-        public List<DocumentMeta> getDocumentsInFolder(String folderName) {
-            return folderMap.getOrDefault(folderName, new ArrayList<>());
-        }
+    public LibraryFolderFragment() {
+        folderMap = new HashMap<>();
     }
+
+    public void addDocumentToFolder(String folderName, DocumentMeta documentMeta) {
+        if (!folderMap.containsKey(folderName)) {
+            folderMap.put(folderName, new ArrayList<>());
+        }
+
+        List<DocumentMeta> documents = folderMap.get(folderName);
+        documents.add(documentMeta);
+    }
+
+    //フォルダに関連するドキュメントを取得するためのメソッド
+    public List<DocumentMeta> getDocumentsInFolder(String folderName) {
+        return folderMap.getOrDefault(folderName, new ArrayList<>());
+    }
+}
diff --git a/feature/library/src/main/java/one/nem/lacerta/feature/library/LibraryTopFragment.java b/feature/library/src/main/java/one/nem/lacerta/feature/library/LibraryTopFragment.java
index 59c1b559..abd7f7c2 100644
--- a/feature/library/src/main/java/one/nem/lacerta/feature/library/LibraryTopFragment.java
+++ b/feature/library/src/main/java/one/nem/lacerta/feature/library/LibraryTopFragment.java
@@ -94,7 +94,7 @@ public class LibraryTopFragment extends Fragment {
         documentRecyclerView.setLayoutManager(layoutManager);
 
         // ドキュメントのメタデータを取得
-        List<DocumentMeta> metas  = document.getAllDocumentMetas(100);
+        List<DocumentMeta> metas = document.getAllDocumentMetas(100);
 
         // ドキュメントをデフォルトフォルダに追加
         // フォルダごとにドキュメントを管理する