diff --git a/jta/src/main/java/com/baeldung/jtademo/JtaDemoApplication.java b/jta/src/main/java/com/baeldung/jtademo/JtaDemoApplication.java
index 037958c38a..4d8779efe5 100644
--- a/jta/src/main/java/com/baeldung/jtademo/JtaDemoApplication.java
+++ b/jta/src/main/java/com/baeldung/jtademo/JtaDemoApplication.java
@@ -3,7 +3,6 @@ package com.baeldung.jtademo;
 import org.hsqldb.jdbc.pool.JDBCXADataSource;
 import org.springframework.beans.factory.annotation.Qualifier;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
-import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.jta.bitronix.BitronixXADataSourceWrapper;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.ComponentScan;
diff --git a/jta/src/main/java/com/baeldung/jtademo/services/AuditService.java b/jta/src/main/java/com/baeldung/jtademo/services/AuditService.java
index 4eb8071757..f6810e15c8 100644
--- a/jta/src/main/java/com/baeldung/jtademo/services/AuditService.java
+++ b/jta/src/main/java/com/baeldung/jtademo/services/AuditService.java
@@ -7,7 +7,6 @@ import org.springframework.jdbc.core.JdbcTemplate;
 import org.springframework.jdbc.core.ResultSetExtractor;
 import org.springframework.stereotype.Service;
 
-import javax.transaction.Transactional;
 import java.math.BigDecimal;
 
 @Service
@@ -26,7 +25,8 @@ public class AuditService {
 
     public TransferLog lastTransferLog() {
         return jdbcTemplate.query("select FROM_ACCOUNT,TO_ACCOUNT,AMOUNT from AUDIT_LOG order by ID desc", (ResultSetExtractor<TransferLog>) (rs) -> {
-            if(!rs.next()) return null;
+            if (!rs.next())
+                return null;
             return new TransferLog(rs.getString(1), rs.getString(2), BigDecimal.valueOf(rs.getDouble(3)));
         });
     }
diff --git a/jta/src/main/java/com/baeldung/jtademo/services/BankAccountService.java b/jta/src/main/java/com/baeldung/jtademo/services/BankAccountService.java
index a50628b109..0c881edbaa 100644
--- a/jta/src/main/java/com/baeldung/jtademo/services/BankAccountService.java
+++ b/jta/src/main/java/com/baeldung/jtademo/services/BankAccountService.java
@@ -6,7 +6,6 @@ import org.springframework.jdbc.core.JdbcTemplate;
 import org.springframework.jdbc.core.ResultSetExtractor;
 import org.springframework.stereotype.Service;
 
-import javax.transaction.Transactional;
 import java.math.BigDecimal;
 
 @Service
diff --git a/jta/src/main/java/com/baeldung/jtademo/services/TellerService.java b/jta/src/main/java/com/baeldung/jtademo/services/TellerService.java
index 2bec79b47e..d3bd80a2ee 100644
--- a/jta/src/main/java/com/baeldung/jtademo/services/TellerService.java
+++ b/jta/src/main/java/com/baeldung/jtademo/services/TellerService.java
@@ -25,7 +25,7 @@ public class TellerService {
         bankAccountService.transfer(fromAccontId, toAccountId, amount);
         auditService.log(fromAccontId, toAccountId, amount);
         BigDecimal balance = bankAccountService.balanceOf(fromAccontId);
-        if(balance.compareTo(BigDecimal.ZERO) <= 0) {
+        if (balance.compareTo(BigDecimal.ZERO) <= 0) {
             throw new RuntimeException("Insufficient fund.");
         }
     }
@@ -35,7 +35,7 @@ public class TellerService {
         bankAccountService.transfer(fromAccontId, toAccountId, amount);
         auditService.log(fromAccontId, toAccountId, amount);
         BigDecimal balance = bankAccountService.balanceOf(fromAccontId);
-        if(balance.compareTo(BigDecimal.ZERO) <= 0) {
+        if (balance.compareTo(BigDecimal.ZERO) <= 0) {
             userTransaction.rollback();
             throw new RuntimeException("Insufficient fund.");
         } else {
diff --git a/jta/src/main/java/com/baeldung/jtademo/services/TestHelper.java b/jta/src/main/java/com/baeldung/jtademo/services/TestHelper.java
index 7b818b3771..c1e8e355ec 100644
--- a/jta/src/main/java/com/baeldung/jtademo/services/TestHelper.java
+++ b/jta/src/main/java/com/baeldung/jtademo/services/TestHelper.java
@@ -1,17 +1,14 @@
 package com.baeldung.jtademo.services;
 
-import com.baeldung.jtademo.dto.TransferLog;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Qualifier;
 import org.springframework.core.io.DefaultResourceLoader;
 import org.springframework.core.io.Resource;
 import org.springframework.jdbc.core.JdbcTemplate;
-import org.springframework.jdbc.core.ResultSetExtractor;
 import org.springframework.jdbc.datasource.init.ScriptUtils;
 import org.springframework.stereotype.Component;
 
 import javax.sql.DataSource;
-import java.math.BigDecimal;
 import java.sql.Connection;
 import java.sql.SQLException;
 
@@ -43,5 +40,4 @@ public class TestHelper {
         }
     }
 
-
 }
diff --git a/jta/src/test/java/com/baeldung/jtademo/JtaDemoUnitTest.java b/jta/src/test/java/com/baeldung/jtademo/JtaDemoUnitTest.java
index 2f72098c41..3f6004262b 100644
--- a/jta/src/test/java/com/baeldung/jtademo/JtaDemoUnitTest.java
+++ b/jta/src/test/java/com/baeldung/jtademo/JtaDemoUnitTest.java
@@ -1,18 +1,22 @@
 package com.baeldung.jtademo;
 
 import com.baeldung.jtademo.dto.TransferLog;
-import com.baeldung.jtademo.services.*;
+import com.baeldung.jtademo.services.AuditService;
+import com.baeldung.jtademo.services.BankAccountService;
+import com.baeldung.jtademo.services.TellerService;
+import com.baeldung.jtademo.services.TestHelper;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.test.context.junit4.SpringRunner;
-import static org.assertj.core.api.Assertions.assertThat;
-import static org.assertj.core.api.Assertions.assertThatThrownBy;
 
 import java.math.BigDecimal;
 
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+
 @RunWith(SpringRunner.class)
 @SpringBootTest(classes = JtaDemoApplication.class)
 public class JtaDemoUnitTest {