ファイルが存在しない場合に作成するメソッドを追加

source/src/main/java/one/nem/lacerta/source/file/FileManager.java

@@ -35,6 +35,8 @@ public interface FileManager {
     // Create
     FileManager createFile() throws IOException;
     FileManager createFile(String fileName) throws IOException;
+    FileManager createFileIfNotExist() throws IOException;
+    FileManager createFileIfNotExist(String fileName) throws IOException;
     FileManager createDirectory() throws IOException;
     FileManager createDirectory(String directoryName) throws IOException;
     FileManager createDirectoryIfNotExist() throws IOException;

source/src/main/java/one/nem/lacerta/source/file/impl/FileManagerImpl.java

@@ -190,6 +190,20 @@ public class FileManagerImpl implements FileManager {
         return this.createFile();
     }
 
+    @Override
+    public FileManager createFileIfNotExist() throws IOException {
+        if (!this.isExist()) {
+            this.createFile();
+        }
+        return this;
+    }
+
+    @Override
+    public FileManager createFileIfNotExist(String fileName) throws IOException {
+        this.resolve(fileName);
+        return this.createFileIfNotExist();
+    }
+
     @Override
     public FileManager createDirectory() throws IOException {
         try {
@@ -237,6 +251,7 @@ public class FileManagerImpl implements FileManager {
             transformer.transform(source, result);
         } catch (Exception e) {
             logger.error("saveXmlInternal", e.getMessage());
+            e.printStackTrace();
             throw new IOException("Failed to save xml");
         }
     }