fix some type errors

PyTeX/format/dict_formatter.py

@@ -40,7 +40,7 @@ class DictFormatter(PyTeXFormatter):
         with open(self.input_file, newline='') as csvfile:
             spamreader = csv.reader(csvfile, delimiter=',', quotechar='|')
             next(spamreader)  # Skip languages line
-            translations = {}
+            translations: Dict = {}
             for language in self._languages:
                 translations[language] = {}
             for line in spamreader:
@@ -54,7 +54,7 @@ class DictFormatter(PyTeXFormatter):
         build_dir.mkdir(parents=True, exist_ok=True)
         self.make_header()
         for language in self._languages:
-            lines = [self.header, '']
+            lines: List[str] = [self.make_header(), '']
             lines += r'\ProvidesDictionary{{{dict_name}}}{{{language}}}'.format(
                 dict_name=self._dict_name,
                 language=language

PyTeX/format/tex_formatter.py

@@ -85,11 +85,16 @@ class TexFormatter(PyTeXFormatter):
         self.write_line(line)
 
     def write_line(self, line: str):
+        if self._output_file is None:
+            raise NotImplementedError
         self._output_file.write(line)
 
     def open_output_stream(self):
         raise NotImplementedError
 
+    def close_output_stream(self):
+        raise NotImplementedError
+
     @property
     def future_config(self) -> Optional[List[Tuple[str, Dict]]]:
         raise NotImplementedError
@@ -98,6 +103,8 @@ class TexFormatter(PyTeXFormatter):
         pass
 
     def format_header(self):
+        if self._output_file is None:
+            raise NotImplementedError
         self._output_file.write(self.make_header())
 
     def format_post_header(self) -> None:
@@ -121,5 +128,5 @@ class TexFormatter(PyTeXFormatter):
         self.format_header()
         self.format_post_header()
         self.format_document()
-        self._output_file.close()
+        self.close_output_stream()
         return self.future_config