diff --git a/fck/cktype/cktypeinterface.py b/fck/cktype/cktypeinterface.py
new file mode 100644
index 0000000..cb368da
--- /dev/null
+++ b/fck/cktype/cktypeinterface.py
@@ -0,0 +1,24 @@
+from typing import List
+from re import Pattern
+
+class CKTYPEINTERFACE:
+    NAME: str
+    EXT: List[str]
+    SYNTAX: List[Pattern] 
+    REGEX: Pattern
+    NULL: str
+
+    def __init__(self):
+        pass
+
+    def gensum(self, data: bytes):
+        pass
+
+    def reset(self):
+        pass
+
+    def __repr__(self) -> str:
+        return ''
+
+    def __eq__(self, other) -> bool:
+        return self.__repr__() == other.__repr__()