[Optimize] CacheStore-API, Framework-API, Event, Common 补充多个单元测试类的文档注释;

[Optimize] CacheKeyTest, CollectionUtilsTest, EventUtilsTest, FactoryInfoTest 在类文档添加测试所针对的类;

ContentGrabbingJi-Event/src/test/java/net/lamgc/cgj/bot/event/EventUtilsTest.java

@@ -27,6 +27,9 @@ import java.lang.reflect.Method;
 import java.util.NoSuchElementException;
 import java.util.UUID;
 
+/**
+ * @see EventUtils
+ */
 public class EventUtilsTest {
 
     @Test