添加一些类注释

sms4j-provider/src/main/java/org/dromara/sms4j/provider/config/SmsConfig.java

@@ -6,6 +6,9 @@ import org.dromara.sms4j.comm.enumerate.ConfigType;
 
 import java.util.ArrayList;
 
+/**
+ * 短信配置类
+ */
 @Data
 public class SmsConfig {
 

sms4j-provider/src/main/java/org/dromara/sms4j/provider/factory/AbstractProviderFactory.java

@@ -6,6 +6,11 @@ import org.dromara.sms4j.api.universal.SupplierConfig;
 import java.lang.reflect.ParameterizedType;
 import java.lang.reflect.Type;
 
+/**
+ * 短信对象建造者
+ * @param <S>
+ * @param <C>
+ */
 public abstract class AbstractProviderFactory<S extends SmsBlend, C extends SupplierConfig> implements BaseProviderFactory<S, C> {
 
     private Class<C> configClass;

sms4j-provider/src/main/java/org/dromara/sms4j/provider/service/AbstractSmsBlend.java

@@ -16,6 +16,10 @@ import java.util.TimerTask;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.Executor;
 
+/**
+ * 短信服务抽象类
+ * @param <C>
+ */
 public abstract class AbstractSmsBlend<C extends SupplierConfig> implements SmsBlend {
 
     @Getter