diff --git a/modules/clients/src/main/java/com/tsurugidb/tsubakuro/examples/book/Insert.java b/modules/clients/src/main/java/com/tsurugidb/tsubakuro/examples/book/Insert.java
index 8145556..79946dd 100644
--- a/modules/clients/src/main/java/com/tsurugidb/tsubakuro/examples/book/Insert.java
+++ b/modules/clients/src/main/java/com/tsurugidb/tsubakuro/examples/book/Insert.java
@@ -19,7 +19,7 @@ public static void doInsert(String url) throws IOException, ServerException, Int
                                                        Placeholders.of("int_for_bar1", long.class),
                                                        Placeholders.of("double_for_bar2", double.class),
                                                        Placeholders.of("char_for_bar3", String.class)).get();
-             Transaction transaction = sqlClient.createTransaction().get();) {
+             Transaction transaction = sqlClient.createTransaction().get()) {
 
             // insert first data into foo table
             transaction.executeStatement(preparedStatement,
diff --git a/modules/clients/src/main/java/com/tsurugidb/tsubakuro/examples/book/Select.java b/modules/clients/src/main/java/com/tsurugidb/tsubakuro/examples/book/Select.java
index 1b6c755..550a5cb 100644
--- a/modules/clients/src/main/java/com/tsurugidb/tsubakuro/examples/book/Select.java
+++ b/modules/clients/src/main/java/com/tsurugidb/tsubakuro/examples/book/Select.java
@@ -14,9 +14,9 @@ public static void doSelect(String url) throws IOException, ServerException, Int
         try (
              Session session = SessionBuilder.connect(url).create();
              SqlClient sqlClient = SqlClient.attach(session);
-             Transaction transaction = sqlClient.createTransaction().get();) {
+             Transaction transaction = sqlClient.createTransaction().get()) {
 
-            try (ResultSet resultSet = transaction.executeQuery("SELECT * FROM foo").get();) {
+            try (ResultSet resultSet = transaction.executeQuery("SELECT * FROM foo").get()) {
                 doSomeWorkUsingResultset(resultSet);
             }
             transaction.commit().get();