diff --git a/uml.puml b/uml.puml
new file mode 100644
index 0000000..e749674
--- /dev/null
+++ b/uml.puml
@@ -0,0 +1,50 @@
+# 界面层
+class Ui:
+    """用户界面"""
+    def display(self):
+        pass
+
+class Res:
+    """资源管理"""
+    def load_resources(self):
+        pass
+
+class Widget:
+    """界面组件"""
+    def create_widget(self):
+        pass
+
+# 业务层
+class Tool:
+    """业务工具"""
+    def process_tool(self):
+        pass
+
+class GtaskRemote:
+    """远程任务接口"""
+    def fetch_data(self):
+        pass
+
+class GtaskException(Exception):
+    """业务异常"""
+    pass
+
+# 模型层
+class Model:
+    """数据模型"""
+    def __init__(self):
+        self.data = None
+
+class GtaskData:
+    """任务数据实体"""
+    def __init__(self, data):
+        self.data = data
+
+# 数据层
+class Data:
+    """数据持久化"""
+    def save(self, model: Model) -> None:
+        pass
+
+    def load(self) -> Model:
+        return Model()
\ No newline at end of file
diff --git a/所有类.txt b/所有类.txt
new file mode 100644
index 0000000..a2e2a48
--- /dev/null
+++ b/所有类.txt
@@ -0,0 +1,133 @@
+Contact
+DataConstants
+NotesDatabaseHelper
+Notes
+Task
+MetaData
+Node
+SqlData
+SqlNote
+TaskList
+ActionFailureException
+NetworkFailureException
+GTaskClient
+GTaskManager
+GTaskSyncService
+WorkingNote
+Note
+DataUtils
+BackupUtils
+TextExport
+GTaskStringUtils
+ResourceParser
+NoteEditText
+AlarmAlertActivity
+
+前者引用后者
+NotesDatabaseHelper<-Notes
+NotesProvider<-Notes
+NotesProvider<-NotesDatabaseHelper
+
+MetaData<-GTaskStringUtils
+
+SqlData<-Notes
+SqlData<-NotesDatabaseHelper
+SqlData<-ActionFailureException
+SqlNote<-Notes
+SqlNote<-ActionFailureException
+SqlNote<-GTaskStringUtils
+SqlNote<-ResourceParser
+
+Task<-NOtes
+Task<-ActionFailureException
+Task<-GTaskStringUtils
+
+TaskList<-NOtes
+TaskList<-ActionFailureException
+TaskList<-GTaskStringUtils
+
+GTaskASyncTask<-NotesListActivity
+GTaskASyncTask<-NotesPreferenceActivity
+
+GTaskClient<-Node
+GTaskClient<-Task
+GTaskClient<-TaskList
+GTaskClient<-ActionFailureException
+GTaskClient<-NetworkFailureException
+GTaskClient<-GTaskStringUtils
+GTaskClient<-NotesPreferenceActivity
+
+GTaskManager<-Notes
+GTaskManager<-MetaData
+GTaskManager<-Node
+GTaskManager<-SqlNote
+GTaskManager<-Task
+GTaskManager<-TaskList
+GTaskManager<-ActionFailureException
+GTaskManager<-NetworkFailureException
+GTaskManager<-DataUtils
+GTaskManager<-GTaskStringUtils
+
+Note<-Notes
+
+WorkingNote<-Notes
+WorkingNote<-ResourceParser
+
+BackupUtils<-Notes
+
+DataUtils<-Notes
+DataUtils<-NotesListAdapter
+
+ResourceParser<-NotesPreferenceActivity
+
+AlarmAlertActivity<-Notes
+AlarmAlertActivity<-DataUtils
+
+AlarmInitReceiver<-Notes
+
+DateTimePickerDialog<-DateTimePicker
+
+FoldersListAdapter<-Notes
+
+NoteEditActivity<-Notes
+NoteEditActivity<-WorkingNote
+NoteEditActivity<-DataUtils
+NoteEditActivity<-ResourceParser
+NoteEditActivity<-DateTimePickerDialog
+NoteEditActivity<-NoteEditText
+NoteEditActivity<-NoteWidgetProvider_2x
+NoteEditActivity<-NoteWidgetProvider_4x
+
+NoteItemData<-Contact_
+NoteItemData<-Notes_
+NoteItemData<-DataUtils_
+
+NotesListActivity<-Notes_
+NotesListActivity<-GTaskSyncService_
+NotesListActivity<-WorkingNote_
+NotesListActivity<-BackupUtils_
+NotesListActivity<-DataUtils_
+NotesListActivity<-ResourceParser_
+NotesListActivity<-NotesListAdapter_
+NotesListActivity<-NoteWidgetProvider_2x_
+NotesListActivity<-NoteWidgetProvider_4x_
+
+NotesListAdapter<-Notes_
+
+NotesListAdapter<-Notes_
+NotesListAdapter<-DataUtils_
+NotesListAdapter<-ResourceParser
+
+NotesPreferenceActivity<-Notes_
+NotesPreferenceActivity<-GTaskSyncService_
+
+NoteWidgetProvider<-Notes_
+NoteWidgetProvider<-ResourceParser_
+NoteWidgetProvider<-NoteEditActivity_
+NoteWidgetProvider<-NotesListActivity_
+
+NoteWidgetProvider_2x<-Notes_
+NoteWidgetProvider_2x<-ResourceParser_
+
+NoteWidgetProvider_4x<-Notes_
+NoteWidgetProvider_4x<-ResourceParser_