添加注释

src/main/java/xyz/zhouxy/plusone/commons/annotation/UnsupportedOperation.java

@@ -6,6 +6,16 @@ import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
 import java.lang.annotation.Documented;
 
+/**
+ * UnsupportedOperation
+ *
+ * <p>标识方法为不支持的操作。该方法将抛出 {@link UnsupportedOperationException}。
+ *
+ * @author zhouxy
+ * @version 1.0
+ * @since 1.0
+ * @see UnsupportedOperationException
+ */
 @Documented
 @Target({ ElementType.CONSTRUCTOR, ElementType.METHOD })
 @Retention(RetentionPolicy.RUNTIME)