Using Scala Reflection for a plugin architecture

I'm building an application Scala that uses a plugin architecture, and I'm trying to load plugins in at runtime. Currently, my plugin loader code is:

import org.clapper.classutil.ClassFinder

object PluginManager extends PluginManager {
  val plugins = new mutable.HashMap[String, Plugin]()
  val pluginFolder = new File("plugins")

  def init(): Unit = {
    val pluginJars = pluginFolder.listFiles.filter(_.getName.endsWith(".jar"))
    val classpath = List(new File(".")) ++ pluginJars
    val finder = ClassFinder(classpath)
    val classes = finder.getClasses()
    val classMap = ClassFinder.classInfoMap(classes.iterator)
    val pluginsToLoad = ClassFinder.concreteSubclasses("org.narrativeandplay.hypedyn.plugins.Plugin", classMap)

    val loader = new URLClassLoader(pluginJars.map({ f => new URL(s"file:${f.getAbsolutePath}") }), ClassLoader.getSystemClassLoader)

    pluginsToLoad.foreach {
      pluginString =>
        val plugin = loader.loadClass(pluginString.name).newInstance().asInstanceOf[Plugin]
        plugins += plugin.name -> plugin
    }
  }
}

(based on http://ift.tt/1CXVk2W).

I had to use the URLClassLoader because my plugin JARs weren't on the classpath when the application started

I was wondering if it's possible to use the Scala Reflection API to replace my use of the URLClassLoader, and if so, how should I do so?