diff --git a/src/poetry/pyproject/__init__.py b/src/poetry/pyproject/__init__.py
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/src/poetry/pyproject/toml.py b/src/poetry/pyproject/toml.py
index afa3bbf8da8..3e9010b4c85 100644
--- a/src/poetry/pyproject/toml.py
+++ b/src/poetry/pyproject/toml.py
@@ -14,12 +14,15 @@
     from pathlib import Path
 
 
-# Enhanced version of poetry-core's PyProjectTOML which is capable of writing
-# pyproject.toml
-#
-# The poetry-core class uses tomli to read the file, here we use tomlkit so as to
-# preserve comments and formatting when writing.
 class PyProjectTOML(BasePyProjectTOML):
+    """
+    Enhanced version of poetry-core's PyProjectTOML
+    which is capable of writing pyproject.toml
+
+    The poetry-core class uses tomli to read the file,
+    here we use tomlkit to preserve comments and formatting when writing.
+    """
+
     def __init__(self, path: Path) -> None:
         super().__init__(path)
         self._toml_file = TOMLFile(path=path)
@@ -32,7 +35,7 @@ def file(self) -> TOMLFile:  # type: ignore[override]
     @property
     def data(self) -> TOMLDocument:
         if self._toml_document is None:
-            if not self._file.exists():
+            if not self.file.exists():
                 self._toml_document = TOMLDocument()
             else:
                 self._toml_document = self.file.read()