diff --git a/src/main/java/org/fluentd/logger/Config.java b/src/main/java/org/fluentd/logger/Config.java
index <HASH>..<HASH> 100644
--- a/src/main/java/org/fluentd/logger/Config.java
+++ b/src/main/java/org/fluentd/logger/Config.java
@@ -17,8 +17,5 @@
 //
 package org.fluentd.logger;
 
-public class Config {
-
-    public static final String FLUENT_SENDER_CLASS = "fluentd.logger.sender.class";
-
-}
\ No newline at end of file
+public class Config implements Constants {
+}
diff --git a/src/main/java/org/fluentd/logger/Constants.java b/src/main/java/org/fluentd/logger/Constants.java
index <HASH>..<HASH> 100644
--- a/src/main/java/org/fluentd/logger/Constants.java
+++ b/src/main/java/org/fluentd/logger/Constants.java
@@ -19,4 +19,8 @@ package org.fluentd.logger;
 
 public interface Constants {
 
+    String FLUENT_SENDER_CLASS = "fluentd.logger.sender.class";
+
+    String FLUENT_RECONNECTOR_CLASS = "fluentd.logger.reconnector.class";
+
 }
changed Config and Constants classes