diff --git a/data/src/main/java/one/nem/lacerta/data/impl/DebugFuncImpl.java b/data/src/main/java/one/nem/lacerta/data/impl/DebugFuncImpl.java
new file mode 100644
index 00000000..10ae885c
--- /dev/null
+++ b/data/src/main/java/one/nem/lacerta/data/impl/DebugFuncImpl.java
@@ -0,0 +1,4 @@
+package one.nem.lacerta.data.impl;
+
+public class DebugFuncImpl {
+}
diff --git a/data/src/main/java/one/nem/lacerta/data/module/DebugFuncModule.java b/data/src/main/java/one/nem/lacerta/data/module/DebugFuncModule.java
new file mode 100644
index 00000000..6e55aeac
--- /dev/null
+++ b/data/src/main/java/one/nem/lacerta/data/module/DebugFuncModule.java
@@ -0,0 +1,4 @@
+package one.nem.lacerta.data.module;
+
+public class DebugFuncModule {
+}
diff --git a/data/src/main/java/one/nem/lacerta/data/repository/DebugFunc.java b/data/src/main/java/one/nem/lacerta/data/repository/DebugFunc.java
new file mode 100644
index 00000000..24752b3c
--- /dev/null
+++ b/data/src/main/java/one/nem/lacerta/data/repository/DebugFunc.java
@@ -0,0 +1,4 @@
+package one.nem.lacerta.data.repository;
+
+public class DebugFunc {
+}