refact(test): rollback DBUtil.java

Author: MuLeiSY2021

hugegraph-loader/src/test/java/org/apache/hugegraph/loader/test/functional/DBUtil.java

@@ -17,13 +17,13 @@
 
 package org.apache.hugegraph.loader.test.functional;
 
-import org.apache.hugegraph.loader.exception.LoadException;
-
 import java.sql.Connection;
 import java.sql.DriverManager;
 import java.sql.SQLException;
 import java.sql.Statement;
 
+import org.apache.hugegraph.loader.exception.LoadException;
+
 public class DBUtil {
 
     private final String driver;
@@ -47,10 +47,10 @@ public void connect() {
             this.conn = DriverManager.getConnection(url, this.user, this.pass);
         } catch (ClassNotFoundException e) {
             throw new LoadException("Invalid driver class '%s'",
-                    e, this.driver);
+                                    e, this.driver);
         } catch (SQLException e) {
             throw new LoadException("Failed to connect database via '%s'",
-                    e, this.url);
+                                    e, this.url);
         }
     }
 
@@ -63,10 +63,10 @@ public void connect(String database) {
             this.conn = DriverManager.getConnection(url, this.user, this.pass);
         } catch (ClassNotFoundException e) {
             throw new LoadException("Invalid driver class '%s'",
-                    e, this.driver);
+                                    e, this.driver);
         } catch (SQLException e) {
             throw new LoadException("Failed to connect database via '%s'",
-                    e, this.url);
+                                    e, this.url);
         }
     }