diff --git a/PyTeX/format/auto_format.py b/PyTeX/format/auto_format.py
new file mode 100644
index 0000000..a019fb8
--- /dev/null
+++ b/PyTeX/format/auto_format.py
@@ -0,0 +1,35 @@
+from pathlib import Path
+from typing import Optional, Dict, Union, Type
+
+from .formatting_config import FormattingConfig
+
+from .dict_formatter import DictFormatter
+from .simple_tex_formatter import SimpleTeXFormatter
+from .dtx_formatter import DTXFormatter
+from .pytex_formatter import PyTeXFormatter
+
+
+def from_file_extension(
+        cls,
+        input_file: Path,
+        config: Optional[FormattingConfig] = None,
+        locate_file_config: bool = True,
+        allow_infile_config: bool = True
+) -> PyTeXFormatter:
+    switcher: Dict[str, Type[Union[DTXFormatter, SimpleTeXFormatter, DictFormatter]]] = {
+        '.dtx.pytex': DTXFormatter,
+        '.sty.pytex': SimpleTeXFormatter,
+        '.cls.pytex': SimpleTeXFormatter,
+        '.dict.pytex': DictFormatter
+    }
+    try:
+        [name, extension] = input_file.name.split('.', maxsplit=1)
+    except:
+        raise NotImplementedError
+
+    return switcher[extension](
+        input_file=input_file,
+        config=config,
+        locate_file_config=locate_file_config,
+        allow_infile_config=allow_infile_config
+    )
diff --git a/PyTeX/format/dict_formatter.py b/PyTeX/format/dict_formatter.py
index c4e2c5d..eb40017 100644
--- a/PyTeX/format/dict_formatter.py
+++ b/PyTeX/format/dict_formatter.py
@@ -31,6 +31,7 @@ class DictFormatter(PyTeXFormatter):
             self._translations = self.parse()
         return self._translations
 
+    @property
     def output_files(self) -> List[str]:
         return [
             DICTIONARY_NAMING_PATTERN.format(
diff --git a/PyTeX/format/dtx_formatter.py b/PyTeX/format/dtx_formatter.py
index 446a86b..fc635d5 100644
--- a/PyTeX/format/dtx_formatter.py
+++ b/PyTeX/format/dtx_formatter.py
@@ -1,5 +1,21 @@
 from .tex_formatter import TexFormatter
+from typing import List, Tuple
+from pathlib import Path
+from .formatting_config import FormattingConfig
 
 
 class DTXFormatter(TexFormatter):
-    pass
+    def dependencies(self) -> List[str]:
+        pass
+
+    def future_config(self) -> List[Tuple[str, FormattingConfig]]:
+        pass
+
+    def output_files(self) -> List[str]:
+        pass
+
+    def open_output_stream(self, build_dir: Path) -> None:
+        pass
+
+    def close_output_stream(self) -> None:
+        pass
diff --git a/PyTeX/format/formatterif.py b/PyTeX/format/formatterif.py
index 2f5f23b..842bf28 100644
--- a/PyTeX/format/formatterif.py
+++ b/PyTeX/format/formatterif.py
@@ -30,22 +30,21 @@ class FormatterIF(ABC):
         needed configurations. Else None.
         """
 
-    @abstractmethod
     @property
+    @abstractmethod
     def output_files(self) -> List[str]:
         """
 
         :return: List of files that will be built when the formatter is invoked
         """
 
-    @abstractmethod
     @property
+    @abstractmethod
     def dependencies(self) -> List[str]:
         """
         :return: List of dependencies (as str filenames)
         """
 
-
     @property
     def input_file(self) -> Path:
         if self._input_file is None:
diff --git a/PyTeX/format/pytex_formatter.py b/PyTeX/format/pytex_formatter.py
index 446268f..920bd03 100644
--- a/PyTeX/format/pytex_formatter.py
+++ b/PyTeX/format/pytex_formatter.py
@@ -3,12 +3,11 @@ from pathlib import Path
 from typing import Optional
 
 from .constants import *
-from .enums import TeXType, TeXFlavour
 from .formatterif import FormatterIF
 from .formatting_config import FormattingConfig
 from .generic_text import GenericText
 from ..logger import logger
-from abc import ABC, abstractmethod
+from abc import ABC
 
 
 class PyTeXFormatter(FormatterIF, ABC):
@@ -16,8 +15,6 @@ class PyTeXFormatter(FormatterIF, ABC):
             self,
             input_file: Optional[Path] = None,
             config: Optional[FormattingConfig] = None,
-            tex_type: Optional[TeXType] = None,
-            tex_flavour: Optional[TeXFlavour] = None,
             locate_file_config: bool = True,
             allow_infile_config: bool = True
     ):
@@ -26,8 +23,6 @@ class PyTeXFormatter(FormatterIF, ABC):
             config=config
         )
         self._config: Optional[FormattingConfig] = self._config  # for type-hinting
-        self._tex_type: Optional[TeXType] = tex_type
-        self._tex_flavour: Optional[TeXFlavour] = tex_flavour
         self._allow_infile_config = allow_infile_config
         self._header: Optional[GenericText] = None
         if locate_file_config:
diff --git a/PyTeX/format/simple_tex_formatter.py b/PyTeX/format/simple_tex_formatter.py
index 7334084..7a7d05f 100644
--- a/PyTeX/format/simple_tex_formatter.py
+++ b/PyTeX/format/simple_tex_formatter.py
@@ -21,5 +21,6 @@ class SimpleTeXFormatter(TexFormatter):
     def dependencies(self) -> List[str]:
         return []  # sty / cls file does not depend on anything
 
+    @property
     def output_files(self) -> List[str]:
         return [self.input_file.with_suffix('').name]