Saving a structure to a sub folder fails if the folder does not exist yet

The bug

See title, saving a structure with a sub folder (eg "test/test") returns "unable to save structure" if the folder does not exist (it works fine if the folder exists).

Code analysis

TemplateManager.writeTemplate(MinecraftServer server, ResourceLocation id) returns false if creating a new instance of FileOutputStream throws a FileNotFoundException when the specified directory does not exist.