Collapse catch clauses

Use multi-catch for exceptions whenever possible.

See gh-9781

spring-boot-tools/spring-boot-maven-plugin/src/main/java/org/springframework/boot/maven/AbstractRunMojo.java

@@ -371,9 +371,6 @@ public abstract class AbstractRunMojo extends AbstractDependencyFilterMojo {
 			addDependencies(urls);
 			return urls.toArray(new URL[urls.size()]);
 		}
-		catch (MalformedURLException ex) {
-			throw new MojoExecutionException("Unable to build classpath", ex);
-		}
 		catch (IOException ex) {
 			throw new MojoExecutionException("Unable to build classpath", ex);
 		}

spring-boot-tools/spring-boot-maven-plugin/src/main/java/org/springframework/boot/maven/SpringApplicationAdminClient.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2015 the original author or authors.
+ * Copyright 2012-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -73,10 +73,7 @@ class SpringApplicationAdminClient {
 			throw new MojoExecutionException("Failed to retrieve Ready attribute",
 					ex.getCause());
 		}
-		catch (MBeanException ex) {
-			throw new MojoExecutionException(ex.getMessage(), ex);
-		}
-		catch (IOException ex) {
+		catch (MBeanException | IOException ex) {
 			throw new MojoExecutionException(ex.getMessage(), ex);
 		}
 	}

spring-boot-tools/spring-boot-maven-plugin/src/main/java/org/springframework/boot/maven/StartMojo.java

@@ -94,11 +94,7 @@ public class StartMojo extends AbstractRunMojo {
 		try {
 			waitForSpringApplication();
 		}
-		catch (MojoExecutionException ex) {
-			runProcess.kill();
-			throw ex;
-		}
-		catch (MojoFailureException ex) {
+		catch (MojoExecutionException | MojoFailureException ex) {
 			runProcess.kill();
 			throw ex;
 		}