add copyright notices

bubble-server/src/main/java/bubble/model/app/HasAppDataCallback.java

@@ -1,3 +1,7 @@
+/**
+ * Copyright (c) 2020 Bubble, Inc.  All rights reserved.
+ * For personal (non-commercial) use, see license: https://getbubblenow.com/bubble-license/
+ */
 package bubble.model.app;
 
 import bubble.model.account.Account;

bubble-server/src/main/java/bubble/rule/BubbleAlternateRegexReplacement.java

@@ -1,3 +1,7 @@
+/**
+ * Copyright (c) 2020 Bubble, Inc.  All rights reserved.
+ * For personal (non-commercial) use, see license: https://getbubblenow.com/bubble-license/
+ */
 package bubble.rule;
 
 import com.fasterxml.jackson.annotation.JsonIgnore;

bubble-server/src/main/java/bubble/rule/bblock/BubbleHideStats.java

@@ -1,3 +1,7 @@
+/**
+ * Copyright (c) 2020 Bubble, Inc.  All rights reserved.
+ * For personal (non-commercial) use, see license: https://getbubblenow.com/bubble-license/
+ */
 package bubble.rule.bblock;
 
 import bubble.model.account.Account;