Add final

Author: kazuki43zoo

src/main/java/org/apache/ibatis/logging/jdbc/BaseJdbcLogger.java

@@ -48,8 +48,8 @@ public abstract class BaseJdbcLogger {
   private final List<Object> columnNames = new ArrayList<>();
   private final List<Object> columnValues = new ArrayList<>();
 
-  protected Log statementLog;
-  protected int queryStack;
+  protected final Log statementLog;
+  protected final int queryStack;
 
   /*
    * Default constructor

src/main/java/org/apache/ibatis/logging/jdbc/ResultSetLogger.java

@@ -38,7 +38,7 @@
  */
 public final class ResultSetLogger extends BaseJdbcLogger implements InvocationHandler {
 
-  private static Set<Integer> BLOB_TYPES = new HashSet<>();
+  private static final Set<Integer> BLOB_TYPES = new HashSet<>();
   private boolean first = true;
   private int rows;
   private final ResultSet rs;