diff --git a/include/xcdat.hpp b/include/xcdat.hpp
index 31e583a..85ccabd 100644
--- a/include/xcdat.hpp
+++ b/include/xcdat.hpp
@@ -1,17 +1,6 @@
-//
-// Created by Shunsuke Kanda on 2017/11/10.
-//
-
-#ifndef XCDAT_XCDAT_HPP
-#define XCDAT_XCDAT_HPP
+#ifndef XCDAT_XCDAT_HPP_
+#define XCDAT_XCDAT_HPP_
 
 #include "xcdat/TrieBuilder.hpp"
 
-namespace xcdat {
-
-
-
-}
-
-
-#endif //XCDAT_XCDAT_HPP
+#endif //XCDAT_XCDAT_HPP_
diff --git a/include/xcdat/Vector.hpp b/include/xcdat/Vector.hpp
index 97a8857..df8aded 100644
--- a/include/xcdat/Vector.hpp
+++ b/include/xcdat/Vector.hpp
@@ -1,7 +1,3 @@
-//
-// Created by Kampersanda on 2017/01/28.
-//
-
 #ifndef XCDAT_VECTOR_HPP
 #define XCDAT_VECTOR_HPP