removed system exit calls

Author: scmacdon

javav2/example_code/firehose/src/main/java/com/example/firehose/CreateDeliveryStream.java

@@ -36,7 +36,7 @@ public static void main(String[] args) {
 
         if (args.length != 3) {
             System.out.println(usage);
-            System.exit(1);
+            return;
         }
 
         String bucketARN = args[0];
@@ -70,7 +70,6 @@ public static void createStream(FirehoseClient firehoseClient, String bucketARN,
 
         } catch (FirehoseException e) {
             System.out.println(e.getLocalizedMessage());
-            System.exit(1);
         }
     }
 }

javav2/example_code/firehose/src/main/java/com/example/firehose/DeleteStream.java

@@ -33,7 +33,7 @@ public static void main(String[] args) {
 
         if (args.length != 1) {
             System.out.println(usage);
-            System.exit(1);
+            return;
         }
 
         String streamName = args[0];
@@ -57,7 +57,6 @@ public static void delStream(FirehoseClient firehoseClient, String streamName) {
 
         } catch (FirehoseException e) {
             System.out.println(e.getLocalizedMessage());
-            System.exit(1);
         }
     }
 }

javav2/example_code/firehose/src/main/java/com/example/firehose/ListDeliveryStreams.java

@@ -42,7 +42,6 @@ public static void listStreams(FirehoseClient firehoseClient) {
 
         } catch (FirehoseException e) {
             System.out.println(e.getLocalizedMessage());
-            System.exit(1);
         }
     }
 }