diff --git a/ContentGrabbingJi-Event/src/main/java/net/lamgc/cgj/bot/event/EventUtils.java b/ContentGrabbingJi-Event/src/main/java/net/lamgc/cgj/bot/event/EventUtils.java
index 6132cb1..1be32ed 100644
--- a/ContentGrabbingJi-Event/src/main/java/net/lamgc/cgj/bot/event/EventUtils.java
+++ b/ContentGrabbingJi-Event/src/main/java/net/lamgc/cgj/bot/event/EventUtils.java
@@ -19,8 +19,6 @@ package net.lamgc.cgj.bot.event;
 
 import java.lang.reflect.Method;
 import java.lang.reflect.Modifier;
-import java.util.HashSet;
-import java.util.Set;
 
 /**
  * 事件处理工具类.
@@ -28,6 +26,8 @@ import java.util.Set;
  */
 public final class EventUtils {
 
+    private EventUtils() {}
+
     /**
      * 检查 {@link EventExecutor} 是否支持取消事件.
      * @param executor 事件执行器.
diff --git a/ContentGrabbingJi-framework-api/src/main/java/net/lamgc/cgj/bot/framework/Author.java b/ContentGrabbingJi-framework-api/src/main/java/net/lamgc/cgj/bot/framework/Author.java
index d49022a..f0108d2 100644
--- a/ContentGrabbingJi-framework-api/src/main/java/net/lamgc/cgj/bot/framework/Author.java
+++ b/ContentGrabbingJi-framework-api/src/main/java/net/lamgc/cgj/bot/framework/Author.java
@@ -24,7 +24,7 @@ import java.util.Objects;
  * <p>我觉得改成维护者会更好一些?
  * @author LamGC
  */
-public class Author {
+public final class Author {
 
     private final String name;
     private final String url;