diff --git a/.idea/sqlDataSources.xml b/.idea/sqlDataSources.xml
new file mode 100644
index 0000000..7bbc472
--- /dev/null
+++ b/.idea/sqlDataSources.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="DdlMappings">
+    <mapping uuid="9a9538a8-bd37-41b0-bc60-73af8279c40c" name="SQLite - accounts.sqlite Mapping">
+      <data-sources db="12a339a0-479d-435e-9bcd-76796d62848c" />
+    </mapping>
+  </component>
+</project>
\ No newline at end of file
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9f11c0d..888aee1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,6 +3,12 @@ project(budget)
 
 set(CMAKE_CXX_STANDARD 20)
 
-add_executable(${PROJECT_NAME} src/main.cpp)
+add_executable(${PROJECT_NAME} src/main.cpp
+		src/database/idatabase.h
+		src/DTO/account.h
+		src/DTO/transaction.h
+		src/DTO/receipt.h
+		src/DTO/plannedTransaction.h
+		src/DTO/dtoObject.h)
 
 target_link_libraries(${PROJECT_NAME} sqlite3)
\ No newline at end of file
diff --git a/src/DTO/account.h b/src/DTO/account.h
new file mode 100644
index 0000000..faeadac
--- /dev/null
+++ b/src/DTO/account.h
@@ -0,0 +1,17 @@
+//
+// Created by quentin on 2/7/24.
+//
+
+#ifndef BUDGET_ACCOUNT_H
+#define BUDGET_ACCOUNT_H
+
+#include <string>
+#include "dtoObject.h"
+
+namespace Budget::DTO {
+	class Account : DTOObject {
+	};
+}
+
+
+#endif //BUDGET_ACCOUNT_H
diff --git a/src/DTO/dtoObject.h b/src/DTO/dtoObject.h
new file mode 100644
index 0000000..271bb93
--- /dev/null
+++ b/src/DTO/dtoObject.h
@@ -0,0 +1,18 @@
+//
+// Created by quentin on 2/7/24.
+//
+
+#ifndef BUDGET_DTOOBJECT_H
+#define BUDGET_DTOOBJECT_H
+
+#include <string>
+namespace Budget::DTO {
+	class DTOObject {
+	protected:
+		unsigned long long int id;
+		std::string updater;
+		unsigned long long int update_date;
+	};
+}
+
+#endif //BUDGET_DTOOBJECT_H
diff --git a/src/DTO/plannedTransaction.h b/src/DTO/plannedTransaction.h
new file mode 100644
index 0000000..65baa21
--- /dev/null
+++ b/src/DTO/plannedTransaction.h
@@ -0,0 +1,13 @@
+//
+// Created by quentin on 2/7/24.
+//
+
+#ifndef BUDGET_PLANNEDTRANSACTION_H
+#define BUDGET_PLANNEDTRANSACTION_H
+
+namespace Budget::DTO {
+	class PlannedTransaction {
+	};
+}
+
+#endif //BUDGET_PLANNEDTRANSACTION_H
diff --git a/src/DTO/receipt.h b/src/DTO/receipt.h
new file mode 100644
index 0000000..4c1f127
--- /dev/null
+++ b/src/DTO/receipt.h
@@ -0,0 +1,14 @@
+//
+// Created by quentin on 2/7/24.
+//
+
+#ifndef BUDGET_RECEIPT_H
+#define BUDGET_RECEIPT_H
+
+namespace Budget::DTO {
+	class Receipt {
+
+	};
+}
+
+#endif //BUDGET_RECEIPT_H
diff --git a/src/DTO/transaction.h b/src/DTO/transaction.h
new file mode 100644
index 0000000..bc95041
--- /dev/null
+++ b/src/DTO/transaction.h
@@ -0,0 +1,14 @@
+//
+// Created by quentin on 2/7/24.
+//
+
+#ifndef BUDGET_TRANSACTION_H
+#define BUDGET_TRANSACTION_H
+
+namespace Budget::DTO {
+	class Transaction {
+
+	};
+}
+
+#endif //BUDGET_TRANSACTION_H
diff --git a/src/database/idatabase.h b/src/database/idatabase.h
new file mode 100644
index 0000000..f6b14c1
--- /dev/null
+++ b/src/database/idatabase.h
@@ -0,0 +1,14 @@
+//
+// Created by quentin on 2/7/24.
+//
+
+#ifndef BUDGET_IDATABASE_H
+#define BUDGET_IDATABASE_H
+
+namespace Budget::Database {
+	class IDatabase {
+
+	};
+}
+
+#endif //BUDGET_IDATABASE_H