CustomOreGen | simple yet powerful , fully customizable cobblestone | Plugin library

I'm making an minecraft-forge mod and I'm having some problems with my config file. I used Configuration#getStringList which allows other people to add a String[] to the config file, so I'm using that to get an block from the array, for example if someone writes minecraft:gold_ore the Block#getBlockFromName works fine because in the array there's only that and nothing else, but if I place minecraft:gold_ore and minecraft:diamond_ore in the next line, it crashes because Block#getBlockFromName reads the String I sent him so he reads it like this minecraft:gold_oreminecraft:diamond_ore (which causes the crash because the block with than name doesn't exist) instead of it reading minecraft:gold_ore and than minecraft:diamond_ore. I basically want to split each line of that config to a separate String or somehow read each line separately. This is how the configuration file looks like: