docs: public static Writer buildBufferedAppendWriter(Path path, Charset charset) {
          try {
              if (JMPath.notExists(path))
                  JMPathOperation.createFileWithParentDirectories(path);
              return Files.newBufferedWriter(path, charset, StandardOpenOption
                      .APPEND);
          } catch (IOException e) {
              return JMExceptionManager.handleExceptionAndReturnNull(log, e,
                      "buildBufferedAppendWriter", path, charset);
          }
      }