diff --git a/config/checkstyle/checkstyle.xml b/config/checkstyle/checkstyle.xml
index 4bc3d0b51..0a5b47eb8 100644
--- a/config/checkstyle/checkstyle.xml
+++ b/config/checkstyle/checkstyle.xml
@@ -10,6 +10,7 @@
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@@ -17,12 +18,65 @@
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diff --git a/core/src/main/java/de/danoeh/antennapod/core/util/Optional.java b/core/src/main/java/de/danoeh/antennapod/core/util/Optional.java
index 0fe11ec53..37f12c01c 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/util/Optional.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/util/Optional.java
@@ -77,7 +77,7 @@ public final class Optional {
* @param Type of the non-existent value
* @return an empty {@code Optional}
*/
- public static Optional empty() {
+ public static Optional empty() {
@SuppressWarnings("unchecked")
Optional t = (Optional) EMPTY;
return t;
diff --git a/core/src/main/java/de/danoeh/antennapod/core/util/id3reader/ChapterReader.java b/core/src/main/java/de/danoeh/antennapod/core/util/id3reader/ChapterReader.java
index d22d08e09..a3f747e09 100644
--- a/core/src/main/java/de/danoeh/antennapod/core/util/id3reader/ChapterReader.java
+++ b/core/src/main/java/de/danoeh/antennapod/core/util/id3reader/ChapterReader.java
@@ -72,7 +72,7 @@ public class ChapterReader extends ID3Reader {
String decodedLink = URLDecoder.decode(link.toString(), "UTF-8");
currentChapter.setLink(decodedLink);
Log.d(TAG, "Found link: " + currentChapter.getLink());
- } catch (IllegalArgumentException _iae) {
+ } catch (IllegalArgumentException iae) {
Log.w(TAG, "Bad URL found in ID3 data");
}