[cleanup] collapse identical catch blocks

With Java7, you don't need multiple identical catch blocks anymore

Related to #52.

(cherry picked from commit 322e1e5)
(cherry picked from commit 9d3b0ad)

Author: dadoonet

src/main/java/org/elasticsearch/cloud/azure/AzureComputeServiceImpl.java

@@ -117,11 +117,7 @@ public Set<Instance> instances() {
                 Set<Instance> instances = buildInstancesFromXml(stream, port_name);
                 logger.trace("get instances from azure: {}", instances);
                 return instances;
-            } catch (ParserConfigurationException e) {
-                logger.warn("can not parse XML response: {}", e.getMessage());
-            } catch (XPathExpressionException e) {
-                logger.warn("can not parse XML response: {}", e.getMessage());
-            } catch (SAXException e) {
+            } catch (ParserConfigurationException | XPathExpressionException | SAXException e) {
                 logger.warn("can not parse XML response: {}", e.getMessage());
             } catch (Exception e) {
                 logger.warn("can not get list of azure nodes: {}", e.getMessage());

src/main/java/org/elasticsearch/cloud/azure/blobstore/AzureBlobContainer.java

@@ -60,9 +60,7 @@ public AzureBlobContainer(BlobPath path, AzureBlobStore blobStore) {
     public boolean blobExists(String blobName) {
         try {
             return blobStore.client().blobExists(blobStore.container(), buildKey(blobName));
-        } catch (URISyntaxException e) {
-            logger.warn("can not access [{}] in container {{}}: {}", blobName, blobStore.container(), e.getMessage());
-        } catch (StorageException e) {
+        } catch (URISyntaxException | StorageException e) {
             logger.warn("can not access [{}] in container {{}}: {}", blobName, blobStore.container(), e.getMessage());
         }
         return false;
@@ -98,10 +96,7 @@ public OutputStream createOutput(String blobName) throws IOException {
     public void deleteBlob(String blobName) throws IOException {
         try {
             blobStore.client().deleteBlob(blobStore.container(), buildKey(blobName));
-        } catch (URISyntaxException e) {
-            logger.warn("can not access [{}] in container {{}}: {}", blobName, blobStore.container(), e.getMessage());
-            throw new IOException(e);
-        } catch (StorageException e) {
+        } catch (URISyntaxException | StorageException e) {
             logger.warn("can not access [{}] in container {{}}: {}", blobName, blobStore.container(), e.getMessage());
             throw new IOException(e);
         }
@@ -112,13 +107,7 @@ public ImmutableMap<String, BlobMetaData> listBlobsByPrefix(@Nullable String pre
 
         try {
             return blobStore.client().listBlobsByPrefix(blobStore.container(), keyPath, prefix);
-        } catch (URISyntaxException e) {
-            logger.warn("can not access [{}] in container {{}}: {}", prefix, blobStore.container(), e.getMessage());
-            throw new IOException(e);
-        } catch (StorageException e) {
-            logger.warn("can not access [{}] in container {{}}: {}", prefix, blobStore.container(), e.getMessage());
-            throw new IOException(e);
-        } catch (ServiceException e) {
+        } catch (URISyntaxException | StorageException | ServiceException e) {
             logger.warn("can not access [{}] in container {{}}: {}", prefix, blobStore.container(), e.getMessage());
             throw new IOException(e);
         }

src/main/java/org/elasticsearch/cloud/azure/blobstore/AzureBlobStore.java

@@ -76,11 +76,7 @@ public void delete(BlobPath path) {
 
         try {
             client.deleteFiles(container, keyPath);
-        } catch (URISyntaxException e) {
-            logger.warn("can not remove [{}] in container {{}}: {}", keyPath, container, e.getMessage());
-        } catch (StorageException e) {
-            logger.warn("can not remove [{}] in container {{}}: {}", keyPath, container, e.getMessage());
-        } catch (ServiceException e) {
+        } catch (URISyntaxException | StorageException | ServiceException e) {
             logger.warn("can not remove [{}] in container {{}}: {}", keyPath, container, e.getMessage());
         }
     }