diff --git a/source/mkw/Patch/PatchOperation/BmgTxtEditor/__init__.py b/source/mkw/Patch/PatchOperation/BmgTxtEditor/__init__.py
index 0a1baf6..2d812de 100644
--- a/source/mkw/Patch/PatchOperation/BmgTxtEditor/__init__.py
+++ b/source/mkw/Patch/PatchOperation/BmgTxtEditor/__init__.py
@@ -8,8 +8,10 @@ if TYPE_CHECKING:
     from source.mkw.Patch.PatchOperation import Layer
     from source.mkw.Patch import Patch
 
-Layer: any
-Patch: any
+
+class InvalidBmgLayerMode(Exception):
+    def __init__(self, layer_mode: str):
+        super().__init__(f"Error : bmg layer mode \"{layer_mode}\" is not implemented")
 
 
 class AbstractLayer(ABC):
diff --git a/source/mkw/Patch/PatchOperation/ImageEditor/__init__.py b/source/mkw/Patch/PatchOperation/ImageEditor/__init__.py
index 1c9fabc..76cf584 100644
--- a/source/mkw/Patch/PatchOperation/ImageEditor/__init__.py
+++ b/source/mkw/Patch/PatchOperation/ImageEditor/__init__.py
@@ -9,8 +9,10 @@ if TYPE_CHECKING:
     from source.mkw.Patch.PatchOperation import Layer
     from source.mkw.Patch import Patch
 
-Layer: any
-Patch: any
+
+class InvalidImageLayerType(Exception):
+    def __init__(self, layer_type: str):
+        super().__init__(f"Error : image layer type \"{layer_type}\" is not implemented")
 
 
 class AbstractLayer(ABC):
diff --git a/source/mkw/Patch/PatchOperation/__init__.py b/source/mkw/Patch/PatchOperation/__init__.py
index 9cd02af..a5ab7fe 100644
--- a/source/mkw/Patch/PatchOperation/__init__.py
+++ b/source/mkw/Patch/PatchOperation/__init__.py
@@ -4,8 +4,10 @@ from typing import IO, Type, TYPE_CHECKING
 if TYPE_CHECKING:
     from source.mkw.Patch import Patch
 
-Patch: any
-Layer: any
+
+class InvalidPatchOperation(Exception):
+    def __init__(self, operation: str):
+        super().__init__(f"Error : operation \"{operation}\" is not implemented")
 
 
 class AbstractPatchOperation(ABC):
diff --git a/source/mkw/Patch/__init__.py b/source/mkw/Patch/__init__.py
index ad626ce..380a691 100644
--- a/source/mkw/Patch/__init__.py
+++ b/source/mkw/Patch/__init__.py
@@ -13,18 +13,3 @@ class PathOutsidePatch(Exception):
 class InvalidPatchMode(Exception):
     def __init__(self, mode: str):
         super().__init__(f"Error : mode \"{mode}\" is not implemented")
-
-
-class InvalidPatchOperation(Exception):
-    def __init__(self, operation: str):
-        super().__init__(f"Error : operation \"{operation}\" is not implemented")
-
-
-class InvalidImageLayerType(Exception):
-    def __init__(self, layer_type: str):
-        super().__init__(f"Error : image layer type \"{layer_type}\" is not implemented")
-
-
-class InvalidBmgLayerMode(Exception):
-    def __init__(self, layer_mode: str):
-        super().__init__(f"Error : bmg layer mode \"{layer_mode}\" is not implemented")