diff --git a/src/NonFungiblePosVault.sol b/src/NonFungiblePosVault.sol
index ae1a80b..ad93221 100644
--- a/src/NonFungiblePosVault.sol
+++ b/src/NonFungiblePosVault.sol
@@ -1,8 +1,6 @@
 // SPDX-License-Identifier: MIT
-pragma solidity >=0.8.25;
+pragma solidity 0.8.25;
 
+import {SolidStateDiamond} from "@solidstate/contracts/proxy/diamond/SolidStateDiamond.sol";
 
-
-contract NonFungiblePosVault {
-
-}
\ No newline at end of file
+contract NonFungiblePosVault is SolidStateDiamond { }
diff --git a/src/modules/EnterSubmodule.sol b/src/modules/EnterSubmodule.sol
index e69de29..8b13789 100644
--- a/src/modules/EnterSubmodule.sol
+++ b/src/modules/EnterSubmodule.sol
@@ -0,0 +1 @@
+
diff --git a/src/modules/ExitSubmodule.sol b/src/modules/ExitSubmodule.sol
index e69de29..8b13789 100644
--- a/src/modules/ExitSubmodule.sol
+++ b/src/modules/ExitSubmodule.sol
@@ -0,0 +1 @@
+
diff --git a/src/modules/OperationSubmodule.sol b/src/modules/OperationSubmodule.sol
index e69de29..8b13789 100644
--- a/src/modules/OperationSubmodule.sol
+++ b/src/modules/OperationSubmodule.sol
@@ -0,0 +1 @@
+
diff --git a/src/modules/VaultSubmodule.sol b/src/modules/VaultSubmodule.sol
new file mode 100644
index 0000000..e69de29