fix procedure syntax

scalac-scoverage-plugin/src/main/scala/scoverage/plugin.scala

@@ -18,7 +18,7 @@ class ScoveragePlugin(val global: Global) extends Plugin {
   val instrumentationComponent = new ScoverageInstrumentationComponent(global, extraAfterPhase, extraBeforePhase)
   override val components: List[PluginComponent] = List(instrumentationComponent)
 
-  override def processOptions(opts: List[String], error: String => Unit) {
+  override def processOptions(opts: List[String], error: String => Unit): Unit = {
     val options = new ScoverageOptions
     for (opt <- opts) {
       if (opt.startsWith("excludedPackages:")) {
@@ -227,7 +227,7 @@ class ScoverageInstrumentationComponent(val global: Global, extraAfterPhase: Opt
     def isStatementIncluded(pos: Position): Boolean = coverageFilter.isLineIncluded(pos)
     def isSymbolIncluded(symbol: Symbol): Boolean = coverageFilter.isSymbolIncluded(symbol.fullNameString)
 
-    def updateLocation(t: Tree) {
+    def updateLocation(t: Tree): Unit = {
       Location(global)(t) match {
         case Some(loc) => this.location = loc
         case _ => reporter.warning(t.pos, s"[warn] Cannot update location for $t")
@@ -259,7 +259,7 @@ class ScoverageInstrumentationComponent(val global: Global, extraAfterPhase: Opt
       )
     }
 
-    def debug(t: Tree) {
+    def debug(t: Tree): Unit = {
       import scala.reflect.runtime.{universe => u}
       reporter.echo(t.getClass.getSimpleName + ": LINE " + safeLine(t) + ": " + u.showRaw(t))
     }

scalac-scoverage-plugin/src/test/scala/scoverage/CoberturaXmlWriterTest.scala

@@ -65,16 +65,16 @@ class CoberturaXmlWriterTest extends FunSuite with BeforeAndAfter with OneInstan
     val builder = domFactory.newDocumentBuilder()
     builder.setErrorHandler(new ErrorHandler() {
       @Override
-      def error(e: SAXParseException) {
+      def error(e: SAXParseException): Unit = {
         fail(e)
       }
       @Override
-      def fatalError(e: SAXParseException) {
+      def fatalError(e: SAXParseException): Unit = {
         fail(e)
       }
 
       @Override
-      def warning(e: SAXParseException) {
+      def warning(e: SAXParseException): Unit = {
         fail(e)
       }
     })

scalac-scoverage-plugin/src/test/scala/scoverage/LocationCompiler.scala

@@ -43,7 +43,7 @@ class LocationCompiler(settings: scala.tools.nsc.Settings, reporter: scala.tools
     }
   }
 
-  override def computeInternalPhases() {
+  override def computeInternalPhases(): Unit = {
     super.computeInternalPhases()
     addToPhasesSet(locationSetter, "sets locations")
   }

scalac-scoverage-plugin/src/test/scala/scoverage/ScoverageCompiler.scala

@@ -145,7 +145,7 @@ class ScoverageCompiler(settings: scala.tools.nsc.Settings, reporter: scala.tool
     }
   }
 
-  override def computeInternalPhases() {
+  override def computeInternalPhases(): Unit = {
     super.computeInternalPhases()
     addToPhasesSet(validator, "scoverage validator")
     addToPhasesSet(instrumentationComponent, "scoverage instrumentationComponent")

scalac-scoverage-runtime/js/src/main/scala/scalajssupport/JsFile.scala

@@ -26,7 +26,7 @@ trait FileFilter {
 }
 
 trait JsFileObject {
-  def write(path: String, data: String, mode: String = "a")
+  def write(path: String, data: String, mode: String = "a"): Unit
   def pathJoin(path: String, child: String): String
   def apply(path: String): JsFile
 }