Correcting Jenkinsfile warning

+ Using the 'stage' step without a block argument is deprecated

Jenkinsfile

@@ -11,8 +11,9 @@ node('linux') {
 
   try
   {
-    stage 'Checkout'
+    stage('Checkout') {
       checkout scm
+    }
   } catch (Exception e) {
     notifyBuild("Checkout Failure")
     throw e
@@ -20,12 +21,13 @@ node('linux') {
 
   try
   {
-    stage 'Compile'
+    stage('Compile') {
       withEnv(mvnEnv) {
         timeout(time: 15, unit: 'MINUTES') {
           sh "mvn -B clean install -Dtest=None"
         }
       }
+    }
   } catch(Exception e) {
     notifyBuild("Compile Failure")
     throw e
@@ -33,12 +35,13 @@ node('linux') {
 
   try
   {
-    stage 'Javadoc'
+    stage('Javadoc') {
       withEnv(mvnEnv) {
         timeout(time: 15, unit: 'MINUTES') {
           sh "mvn -B javadoc:javadoc"
         }
       }
+    }
   } catch(Exception e) {
     notifyBuild("Javadoc Failure")
     throw e
@@ -46,7 +49,7 @@ node('linux') {
 
   try
   {
-    stage 'Test'
+    stage('Test') {
       withEnv(mvnEnv) {
         timeout(time: 60, unit: 'MINUTES') {
           // Run test phase / ignore test failures
@@ -72,6 +75,7 @@ node('linux') {
           notifyBuild("Unstable / Test Errors")
         }
       }
+    }
   } catch(Exception e) {
     notifyBuild("Test Failure")
     throw e