diff --git a/examples/grails3-neo4j-hibernate/grails-app/init/BootStrap.groovy b/examples/grails3-neo4j-hibernate/grails-app/init/BootStrap.groovy
index 1287daee..786c727d 100644
--- a/examples/grails3-neo4j-hibernate/grails-app/init/BootStrap.groovy
+++ b/examples/grails3-neo4j-hibernate/grails-app/init/BootStrap.groovy
@@ -1,7 +1,12 @@
+import javax.servlet.ServletContext
+
 class BootStrap {
 
-    def init = { servletContext ->
+    ServletContext servletContext
+
+    def init = {
     }
+
     def destroy = {
     }
 }
diff --git a/examples/grails3-neo4j/grails-app/init/BootStrap.groovy b/examples/grails3-neo4j/grails-app/init/BootStrap.groovy
index 1287daee..786c727d 100644
--- a/examples/grails3-neo4j/grails-app/init/BootStrap.groovy
+++ b/examples/grails3-neo4j/grails-app/init/BootStrap.groovy
@@ -1,7 +1,12 @@
+import javax.servlet.ServletContext
+
 class BootStrap {
 
-    def init = { servletContext ->
+    ServletContext servletContext
+
+    def init = {
     }
+
     def destroy = {
     }
 }
diff --git a/examples/test-data-service/grails-app/init/example/BootStrap.groovy b/examples/test-data-service/grails-app/init/example/BootStrap.groovy
index 72406d5c..595a09c9 100644
--- a/examples/test-data-service/grails-app/init/example/BootStrap.groovy
+++ b/examples/test-data-service/grails-app/init/example/BootStrap.groovy
@@ -1,9 +1,14 @@
 package example
 
+import javax.servlet.ServletContext
+
 class BootStrap {
 
-    def init = { servletContext ->
+    ServletContext servletContext
+
+    def init = {
     }
+
     def destroy = {
     }
 }