diff --git a/spring-cloud-stream-module-launcher/src/main/java/org/springframework/boot/loader/ModuleJarLauncher.java b/spring-cloud-stream-module-launcher/src/main/java/org/springframework/boot/loader/ModuleJarLauncher.java
index 26abec996..193d2d572 100644
--- a/spring-cloud-stream-module-launcher/src/main/java/org/springframework/boot/loader/ModuleJarLauncher.java
+++ b/spring-cloud-stream-module-launcher/src/main/java/org/springframework/boot/loader/ModuleJarLauncher.java
@@ -21,6 +21,12 @@ import java.util.List;
 import org.springframework.boot.loader.archive.Archive;
 import org.springframework.boot.loader.util.AsciiBytes;
 
+/**
+ * A (possibly temporary) alternative to {@link JarLauncher} that provides a
+ * public {@link #launch(String[])} method.
+ *
+ * @author Mark Fisher
+ */
 public class ModuleJarLauncher extends ExecutableArchiveLauncher {
 
 	private static final AsciiBytes LIB = new AsciiBytes("lib/");
diff --git a/spring-cloud-stream-module-launcher/src/main/java/org/springframework/cloud/stream/module/launcher/ModuleLauncher.java b/spring-cloud-stream-module-launcher/src/main/java/org/springframework/cloud/stream/module/launcher/ModuleLauncher.java
index b35ae2ade..446c5b006 100644
--- a/spring-cloud-stream-module-launcher/src/main/java/org/springframework/cloud/stream/module/launcher/ModuleLauncher.java
+++ b/spring-cloud-stream-module-launcher/src/main/java/org/springframework/cloud/stream/module/launcher/ModuleLauncher.java
@@ -17,6 +17,7 @@
 package org.springframework.cloud.stream.module.launcher;
 
 import java.io.File;
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.Executor;
@@ -103,7 +104,7 @@ public class ModuleLauncher {
 				ModuleJarLauncher jarLauncher = new ModuleJarLauncher(jarFileArchive);
 				jarLauncher.launch(args);
 			}
-			catch (Exception e) {
+			catch (IOException e) {
 				e.printStackTrace();
 			}
 		}