[auto-generated] StringIndexOutOfBoundsException during Bukkit create

[minecraft-dev-autoreporter]

Plugin Name: Minecraft Development
Plugin Version: 2017.1-0.7.1-30
OS Name: Windows 10
Java Version: 1.8.0_112-release
Java VM Vendor: JetBrains s.r.o
App Name: IDEA
App Full Name: IntelliJ IDEA
App Version Name: IntelliJ IDEA
Is EAP: false
App Build: IU-171.4424.56
App Version: 2017.1.3
Last Action: NewProject

java.lang.RuntimeException: java.lang.StringIndexOutOfBoundsException: String index out of range: -1
	at com.intellij.openapi.application.impl.LaterInvocator.invokeAndWait(LaterInvocator.java:188)
	at com.intellij.openapi.application.impl.ApplicationImpl.invokeAndWait(ApplicationImpl.java:680)
	at com.demonwav.mcdev.platform.bukkit.BukkitProjectConfiguration.create(BukkitProjectConfiguration.kt:89)
	at com.demonwav.mcdev.creator.MinecraftProjectCreator$doSingleModuleCreate$1.run(MinecraftProjectCreator.kt:77)
	at com.intellij.openapi.progress.impl.CoreProgressManager$TaskRunnable.run(CoreProgressManager.java:726)
	at com.intellij.openapi.progress.impl.CoreProgressManager.a(CoreProgressManager.java:176)
	at com.intellij.openapi.progress.impl.CoreProgressManager.a(CoreProgressManager.java:556)
	at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:501)
	at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:66)
	at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:163)
	at com.intellij.openapi.progress.impl.ProgressManagerImpl$1.run(ProgressManagerImpl.java:137)
	at com.intellij.openapi.application.impl.ApplicationImpl$2.run(ApplicationImpl.java:334)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.StringIndexOutOfBoundsException: String index out of range: -1
	at java.lang.String.substring(String.java:1967)
	at com.demonwav.mcdev.platform.bukkit.BukkitProjectConfiguration$create$$inlined$runWriteTask$2$1.run(Util.kt:116)
	at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:1023)
	at com.demonwav.mcdev.platform.bukkit.BukkitProjectConfiguration$create$$inlined$runWriteTask$2.run(Util.kt:108)
	at com.intellij.openapi.application.TransactionGuardImpl$2.run(TransactionGuardImpl.java:303)
	at com.intellij.openapi.application.impl.LaterInvocator$1.run(LaterInvocator.java:165)
	at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.a(LaterInvocator.java:410)
	at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:399)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:762)
	at java.awt.EventQueue.access$500(EventQueue.java:98)
	at java.awt.EventQueue$3.run(EventQueue.java:715)
	at java.awt.EventQueue$3.run(EventQueue.java:709)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:732)
	at com.intellij.ide.IdeEventQueue.k(IdeEventQueue.java:827)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:655)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:365)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

java.lang.StringIndexOutOfBoundsException: String index out of range: -1

[DenWav]

Input needs to be validated so the Main Class Name field on all projects cannot be entered without a package.