Merge pull request 'Implementing semipersistent storage' (#5) from semipersistent-storage into master

Reviewed-by: Chaoscaot <chaoscaot444@gmail.com>

src/de/steamwar/bungeecore/Storage.java

@@ -0,0 +1,22 @@
+package de.steamwar.bungeecore;
+
+import net.md_5.bungee.api.connection.ProxiedPlayer;
+
+import java.sql.Timestamp;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class Storage {
+    private Storage(){}
+
+    public static final Map<ProxiedPlayer, List<ProxiedPlayer>> challenges = new HashMap<>();
+
+    public static final Map<ProxiedPlayer, ProxiedPlayer> lastChats = new HashMap<>();
+
+    public static final Map<Integer, List<Integer>> teamInvitations = new HashMap<>(); // UserID -> List<TeamIDs>
+
+    public static final Map<ProxiedPlayer, Timestamp> sessions = new HashMap<>(); // Contains session start timestamp
+
+    public static final Map<Integer, Subserver> eventServer = new HashMap<>(); // TeamID -> Subserver map
+}