Add package-info.java files.

guacamole-ext/src/main/java/net/sourceforge/guacamole/net/auth/permission/package-info.java

@@ -0,0 +1,7 @@
+
+/**
+ * Provides classes which describe the various permissions a Guacamole user
+ * can be granted.
+ */
+package net.sourceforge.guacamole.net.auth.permission;
+

guacamole-ext/src/main/java/net/sourceforge/guacamole/net/auth/simple/package-info.java

@@ -0,0 +1,8 @@
+
+/**
+ * Provides a basic AuthenticationProvider base class that can be used to create
+ * simple AuthenticationProviders in the same way allowed by the old
+ * authentication API.
+ */
+package net.sourceforge.guacamole.net.auth.simple;
+