Add missing copyright headers.

src/main/java/unomodding/canary/playtimelimiter/data/PlayTimeBlacklistAccess.java

@@ -1,3 +1,9 @@
+/**
+ * Copyright 2014 by UnoModding and Contributors
+ *
+ * This work is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License.
+ * To view a copy of this license, visit http://creativecommons.org/licenses/by-sa/3.0/.
+ */
 package unomodding.canary.playtimelimiter.data;
 
 import net.canarymod.database.Column;

src/main/java/unomodding/canary/playtimelimiter/data/PlayTimeDataAccess.java

@@ -1,3 +1,9 @@
+/**
+ * Copyright 2014 by UnoModding and Contributors
+ *
+ * This work is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License.
+ * To view a copy of this license, visit http://creativecommons.org/licenses/by-sa/3.0/.
+ */
 package unomodding.canary.playtimelimiter.data;
 
 import net.canarymod.database.Column;

src/main/java/unomodding/canary/playtimelimiter/exceptions/UnknownPlayerException.java

@@ -12,6 +12,6 @@ public class UnknownPlayerException extends Exception {
     private static final long serialVersionUID = -5987543214085051018L;
 
     public UnknownPlayerException(UUID uuid) {
-        super("Unknown player with UUID of " + uuid);
+        super("Unknown player with the UUID of " + uuid);
     }
 }