diff --git a/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/oauth2/resource/AuthoritiesExtractor.java b/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/oauth2/resource/AuthoritiesExtractor.java
index 4db5c9e9f14..44f8866e079 100644
--- a/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/oauth2/resource/AuthoritiesExtractor.java
+++ b/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/oauth2/resource/AuthoritiesExtractor.java
@@ -32,7 +32,6 @@ public interface AuthoritiesExtractor {
 
 	/**
 	 * Extract the authorities from the resource server's response.
-	 *
 	 * @param map the response
 	 * @return the extracted authorities
 	 */
diff --git a/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/oauth2/resource/FixedAuthoritiesExtractor.java b/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/oauth2/resource/FixedAuthoritiesExtractor.java
index 3d3045fd5d5..ff6afb65973 100644
--- a/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/oauth2/resource/FixedAuthoritiesExtractor.java
+++ b/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/security/oauth2/resource/FixedAuthoritiesExtractor.java
@@ -41,19 +41,19 @@ public class FixedAuthoritiesExtractor implements AuthoritiesExtractor {
 	public List<GrantedAuthority> extractAuthorities(Map<String, Object> map) {
 		String authorities = "ROLE_USER";
 		if (map.containsKey(AUTHORITIES)) {
-			Object object = map.get(AUTHORITIES);
-			if (object instanceof Collection) {
-				authorities = StringUtils
-						.collectionToCommaDelimitedString((Collection<?>) object);
-			}
-			else if (ObjectUtils.isArray(object)) {
-				authorities = StringUtils.arrayToCommaDelimitedString((Object[]) object);
-			}
-			else if (object != null) {
-				authorities = object.toString();
-			}
+			authorities = asAuthorities(map.get(AUTHORITIES));
 		}
 		return AuthorityUtils.commaSeparatedStringToAuthorityList(authorities);
 	}
 
+	private String asAuthorities(Object object) {
+		if (object instanceof Collection) {
+			return StringUtils.collectionToCommaDelimitedString((Collection<?>) object);
+		}
+		if (ObjectUtils.isArray(object)) {
+			return StringUtils.arrayToCommaDelimitedString((Object[]) object);
+		}
+		return object.toString();
+	}
+
 }
diff --git a/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/security/oauth2/resource/FixedAuthoritiesExtractorTests.java b/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/security/oauth2/resource/FixedAuthoritiesExtractorTests.java
index d3b5a09a1a0..c1272fc2e84 100644
--- a/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/security/oauth2/resource/FixedAuthoritiesExtractorTests.java
+++ b/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/security/oauth2/resource/FixedAuthoritiesExtractorTests.java
@@ -25,6 +25,8 @@ import org.junit.Test;
 import static org.junit.Assert.assertEquals;
 
 /**
+ * Tests for {@link FixedAuthoritiesExtractor}.
+ *
  * @author Dave Syer
  */
 public class FixedAuthoritiesExtractorTests {
diff --git a/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/security/oauth2/resource/ResourceServerTokenServicesConfigurationTests.java b/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/security/oauth2/resource/ResourceServerTokenServicesConfigurationTests.java
index df97746b553..a526d116c22 100644
--- a/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/security/oauth2/resource/ResourceServerTokenServicesConfigurationTests.java
+++ b/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/security/oauth2/resource/ResourceServerTokenServicesConfigurationTests.java
@@ -204,8 +204,10 @@ public class ResourceServerTokenServicesConfigurationTests {
 					return AuthorityUtils
 							.commaSeparatedStringToAuthorityList("ROLE_ADMIN");
 				}
+
 			};
 		}
+
 	}
 
 	@Import({ OAuth2RestOperationsConfiguration.class })
diff --git a/spring-boot/src/main/java/org/springframework/boot/logging/LoggingSystem.java b/spring-boot/src/main/java/org/springframework/boot/logging/LoggingSystem.java
index 03e331c5dfe..8b634066a5e 100644
--- a/spring-boot/src/main/java/org/springframework/boot/logging/LoggingSystem.java
+++ b/spring-boot/src/main/java/org/springframework/boot/logging/LoggingSystem.java
@@ -96,7 +96,6 @@ public abstract class LoggingSystem {
 	 * Returns a {@link Runnable} that can handle shutdown of this logging system when the
 	 * JVM exits. The default implementation returns {@code null}, indicating that no
 	 * shutdown is required.
-	 *
 	 * @return the shutdown handler, or {@code null}
 	 */
 	public Runnable getShutdownHandler() {
diff --git a/spring-boot/src/test/java/org/springframework/boot/logging/LoggingApplicationListenerTests.java b/spring-boot/src/test/java/org/springframework/boot/logging/LoggingApplicationListenerTests.java
index d681efb22ba..25f65210928 100644
--- a/spring-boot/src/test/java/org/springframework/boot/logging/LoggingApplicationListenerTests.java
+++ b/spring-boot/src/test/java/org/springframework/boot/logging/LoggingApplicationListenerTests.java
@@ -414,4 +414,5 @@ public class LoggingApplicationListenerTests {
 		}
 
 	}
+
 }