Bukkit

local fileContents = plugin.readFile(filename)
plugin.writeFile(filename, content)

-- Set the value if not already in the config
-- plugin.config.setDefault(path, value)
plugin.config.setDefault("test.bool", false)
plugin.config.setDefault("test.int", 45)

-- Set the value regardless of if it already exists
-- plugin.config.set(path, value)
plugin.config.set("test.float", 4.7)
plugin.config.set("test.string", "a string")

-- plugin.config.get(path, default)
plugin.config.get("test.bool", true)

-- Save the config to file
plugin.config.save()