diff --git a/src/main/java/com/redfin/sitemapgenerator/SitemapGenerator.java b/src/main/java/com/redfin/sitemapgenerator/SitemapGenerator.java
index 4043008..1737873 100644
--- a/src/main/java/com/redfin/sitemapgenerator/SitemapGenerator.java
+++ b/src/main/java/com/redfin/sitemapgenerator/SitemapGenerator.java
@@ -60,7 +60,7 @@ abstract class SitemapGenerator<U extends ISitemapUrl, THIS extends SitemapGener
 	 * or else write out one sitemap immediately.
 	 * @param url the URL to add to this sitemap
 	 * @return this
-     * @throws IOException when closing of streams has failed
+	 * @throws IOException when closing of streams has failed
 	 */
 	public THIS addUrl(U url) throws IOException {
 		if (finished) throw new RuntimeException("Sitemap already printed; you must create a new generator to make more sitemaps"); 
@@ -83,7 +83,7 @@ abstract class SitemapGenerator<U extends ISitemapUrl, THIS extends SitemapGener
 	 * or write out one sitemap immediately.
 	 * @param urls the URLs to add to this sitemap
 	 * @return this
-     * @throws IOException when closing of streams has failed.
+	 * @throws IOException when closing of streams has failed.
 	 */
 	public THIS addUrls(Iterable<? extends U> urls) throws IOException {
 		for (U url : urls) addUrl(url);
@@ -95,7 +95,7 @@ abstract class SitemapGenerator<U extends ISitemapUrl, THIS extends SitemapGener
 	 * or write out one sitemap immediately.
 	 * @param urls the URLs to add to this sitemap
 	 * @return this
-     * @throws IOException when closing of streams has failed.
+	 * @throws IOException when closing of streams has failed.
 	 */
 	public THIS addUrls(U... urls) throws IOException {
 		for (U url : urls) addUrl(url);
@@ -123,8 +123,8 @@ abstract class SitemapGenerator<U extends ISitemapUrl, THIS extends SitemapGener
 		U sitemapUrl;
 		try {
 			sitemapUrl = renderer.getUrlClass().getConstructor(String.class).newInstance(url);
-            return addUrl(sitemapUrl);
-        } catch (Exception e) {
+			return addUrl(sitemapUrl);
+		} catch (Exception e) {
 			throw new RuntimeException(e);
 		}
 	}
@@ -150,8 +150,8 @@ abstract class SitemapGenerator<U extends ISitemapUrl, THIS extends SitemapGener
 		U sitemapUrl;
 		try {
 			sitemapUrl = renderer.getUrlClass().getConstructor(URL.class).newInstance(url);
-            return addUrl(sitemapUrl);
-        } catch (Exception e) {
+			return addUrl(sitemapUrl);
+		} catch (Exception e) {
 			throw new RuntimeException(e);
 		}
 	}
@@ -169,10 +169,10 @@ abstract class SitemapGenerator<U extends ISitemapUrl, THIS extends SitemapGener
 		if (finished) throw new RuntimeException("Sitemap already printed; you must create a new generator to make more sitemaps");
 		if (!allowEmptySitemap && urls.isEmpty() && mapCount == 0) throw new RuntimeException("No URLs added, sitemap would be empty; you must add some URLs with addUrls");
 		try {
-            writeSiteMap();
-        } catch (IOException ex) {
-		    throw new RuntimeException("Closing of streams has failed at some point.", ex);
-        }
+			writeSiteMap();
+		} catch (IOException ex) {
+			throw new RuntimeException("Closing of streams has failed at some point.", ex);
+		}
 		finished = true;
 		return outFiles;
 	}
@@ -215,7 +215,7 @@ abstract class SitemapGenerator<U extends ISitemapUrl, THIS extends SitemapGener
 	/**
 	 * After you've called {@link #write()}, call this to generate a sitemap index of all sitemaps you generated.
 	 * The sitemap index is written to {baseDir}/sitemap_index.xml
-     * @throws IOException when closing of streams has failed
+	 * @throws IOException when closing of streams has failed
 	 */
 	public File writeSitemapsWithIndex() throws IOException {
 		if (!finished) throw new RuntimeException("Sitemaps not generated yet; call write() first");
@@ -227,7 +227,7 @@ abstract class SitemapGenerator<U extends ISitemapUrl, THIS extends SitemapGener
 	 * After you've called {@link #write()}, call this to generate a sitemap index of all sitemaps you generated.
 	 *
 	 * @param outFile the destination file of the sitemap index.
-     * @throws IOException when closing of streams has failed
+	 * @throws IOException when closing of streams has failed
 	 */
 	public File writeSitemapsWithIndex(File outFile) throws IOException {
 		if (!finished) throw new RuntimeException("Sitemaps not generated yet; call write() first");
@@ -251,8 +251,8 @@ abstract class SitemapGenerator<U extends ISitemapUrl, THIS extends SitemapGener
 		File outFile = new File(baseDir, fileNamePrefix+fileNameSuffix);
 		outFiles.add(outFile);
 
-        OutputStreamWriter out = null;
-        try {
+		OutputStreamWriter out = null;
+		try {
 			if (gzip) {
 				FileOutputStream fileStream = new FileOutputStream(outFile);
 				GZIPOutputStream gzipStream = new GZIPOutputStream(fileStream);
@@ -270,10 +270,10 @@ abstract class SitemapGenerator<U extends ISitemapUrl, THIS extends SitemapGener
 		} catch (SAXException e) {
 			throw new RuntimeException("Sitemap file failed to validate (bug?)", e);
 		} finally {
-            if(out != null) {
-                out.close();
-            }
-        }
+			if(out != null) {
+				out.close();
+			}
+		}
 	}
 	
 	private void writeSiteMap(OutputStreamWriter out) throws IOException {
diff --git a/src/main/java/com/redfin/sitemapgenerator/SitemapIndexGenerator.java b/src/main/java/com/redfin/sitemapgenerator/SitemapIndexGenerator.java
index 1d31f33..513fb19 100644
--- a/src/main/java/com/redfin/sitemapgenerator/SitemapIndexGenerator.java
+++ b/src/main/java/com/redfin/sitemapgenerator/SitemapIndexGenerator.java
@@ -222,27 +222,27 @@ public class SitemapIndexGenerator {
 	/** Writes out the sitemap index */
 	public void write() {
 		if (!allowEmptyIndex && urls.isEmpty()) throw new RuntimeException("No URLs added, sitemap index would be empty; you must add some URLs with addUrls");
-        try {
-            FileWriter out = null;
-            try {
-                // TODO gzip? is that legal for a sitemap index?
-                out = new FileWriter(outFile);
-                writeSiteMap(out);
-                out.flush();
+		try {
+			FileWriter out = null;
+			try {
+				// TODO gzip? is that legal for a sitemap index?
+				out = new FileWriter(outFile);
+				writeSiteMap(out);
+				out.flush();
 
-                if (autoValidate) SitemapValidator.validateSitemapIndex(outFile);
-            } catch (IOException e) {
-                throw new RuntimeException("Problem writing sitemap index file " + outFile, e);
-            } catch (SAXException e) {
-                throw new RuntimeException("Problem validating sitemap index file (bug?)", e);
-            } finally {
-                if(out != null) {
-                    out.close();
-                }
-            }
-        } catch (IOException ex) {
-            throw new RuntimeException("Closing of stream has failed.", ex);
-        }
+				if (autoValidate) SitemapValidator.validateSitemapIndex(outFile);
+			} catch (IOException e) {
+				throw new RuntimeException("Problem writing sitemap index file " + outFile, e);
+			} catch (SAXException e) {
+				throw new RuntimeException("Problem validating sitemap index file (bug?)", e);
+			} finally {
+				if(out != null) {
+					out.close();
+				}
+			}
+		} catch (IOException ex) {
+			throw new RuntimeException("Closing of stream has failed.", ex);
+		}
 
 	}
 	
diff --git a/src/main/java/com/redfin/sitemapgenerator/SitemapValidator.java b/src/main/java/com/redfin/sitemapgenerator/SitemapValidator.java
index e0cc5fc..b3a0b37 100644
--- a/src/main/java/com/redfin/sitemapgenerator/SitemapValidator.java
+++ b/src/main/java/com/redfin/sitemapgenerator/SitemapValidator.java
@@ -38,7 +38,7 @@ public class SitemapValidator {
 	private synchronized static void lazyLoad() {
 		if (sitemapSchema != null)  return;
 		SchemaFactory factory =
-            SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
+			SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
 		try {
 			sitemapSchema = lazyLoad(factory, "sitemap.xsd");
 			sitemapIndexSchema = lazyLoad(factory, "siteindex.xsd");
@@ -48,20 +48,20 @@ public class SitemapValidator {
 	}
 
 	private synchronized static Schema lazyLoad(SchemaFactory factory, String resource) throws IOException, SAXException {
-	    InputStream stream = null;
+		InputStream stream = null;
 
-        try {
-            stream = SitemapValidator.class.getResourceAsStream(resource);
-            if (stream == null) throw new RuntimeException("BUG Couldn't load " + resource);
-            StreamSource source = new StreamSource(stream);
-            return factory.newSchema(source);
-        } finally {
-            if(stream != null) {
-                stream.close();
-            }
-        }
+		try {
+			stream = SitemapValidator.class.getResourceAsStream(resource);
+			if (stream == null) throw new RuntimeException("BUG Couldn't load " + resource);
+			StreamSource source = new StreamSource(stream);
+			return factory.newSchema(source);
+		} finally {
+			if(stream != null) {
+				stream.close();
+			}
+		}
 
-    }
+	}
 	
 	/** Validates an ordinary web sitemap file (NOT a Google-specific sitemap) */
 	public static void validateWebSitemap(File sitemap) throws SAXException, IOException {
@@ -77,7 +77,7 @@ public class SitemapValidator {
 
 	private static void validateXml(File sitemap, Schema schema) throws SAXException, IOException {
 		Validator validator = schema.newValidator();
-        FileReader reader = null;
+		FileReader reader = null;
 		try {
 			reader = new FileReader(sitemap);
 			SAXSource source = new SAXSource(new InputSource(reader));
@@ -85,10 +85,10 @@ public class SitemapValidator {
 		} catch (IOException e) {
 			throw new RuntimeException(e);
 		} finally {
-		    if(reader != null) {
-		        reader.close();
-            }
-        }
+			if(reader != null) {
+				reader.close();
+			}
+		}
 	}
 
 }