ReplicationConfig: Add missing JavaDoc

Change-Id: I25b1044e3cb650b5eb999cfdf4720c0ccaf160b9

src/main/java/com/googlesource/gerrit/plugins/replication/ReplicationConfig.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/replication/ReplicationConfig.java b/src/main/java/com/googlesource/gerrit/plugins/replication/ReplicationConfig.java
index d3d64db..b978952 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/replication/ReplicationConfig.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/replication/ReplicationConfig.java
@@ -60,8 +60,18 @@
    */
   Path getEventsDirectory();
 
+  /**
+   * Timeout for establishing SSH connection to remote.
+   *
+   * @return connection timeout, zero if infinite.
+   */
   int getSshConnectionTimeout();
 
+  /**
+   * Timeout for executing an SSH command on remote.
+   *
+   * @return command timeout, zero if infinite.
+   */
   int getSshCommandTimeout();
 
   /**
@@ -72,5 +82,10 @@
    */
   String getVersion();
 
+  /**
+   * Return a copy of the current config.
+   *
+   * @return the config.
+   */
   Config getConfig();
 }