@@ -0,0 +1,651 @@
+package codeu.chat.server;%0A%0Aimport java.util.Collection;%0Aimport java.util.Map;%0A%0Aimport codeu.chat.common.ConversationHeader;%0Aimport codeu.chat.common.ConversationPayload;%0Aimport codeu.chat.common.Message;%0Aimport codeu.chat.common.Secret;%0Aimport codeu.chat.common.User;%0Aimport codeu.chat.util.Uuid;%0A%0Apublic interface PersistenceFileSkeleton %7B%0A  public interface ServerInfo %7B%0A    Uuid id();%0A    Secret secret();%0A    Uuid lastSeen();%0A  %7D%0A  %0A  ServerInfo serverInfo();%0A  %0A  Map%3CUuid, User%3E users();%0A  %0A  Map%3CUuid, ConversationHeader%3E conversationHeaders();%0A  Map%3CUuid, ConversationPayload%3E conversationPayloads();%0A  %0A  Map%3CUuid, Message%3E messages();%0A  %0A%7D%0A

Create persistence file's skeleton with an interface