[MNG-6847] Use diamond operator

src/main/java/org/apache/maven/shared/io/download/DefaultDownloadManager.java

@@ -54,7 +54,7 @@ public class DefaultDownloadManager implements DownloadManager {
 
     private WagonManager wagonManager;
 
-    private Map<String, File> cache = new HashMap<String, File>();
+    private Map<String, File> cache = new HashMap<>();
 
     /**
      * Create an instance of the {@code DefaultDownloadManager}.

src/main/java/org/apache/maven/shared/io/location/Locator.java

@@ -39,15 +39,15 @@ public final class Locator {
      */
     public Locator(List<LocatorStrategy> strategies, MessageHolder messageHolder) {
         this.messageHolder = messageHolder;
-        this.strategies = new ArrayList<LocatorStrategy>(strategies);
+        this.strategies = new ArrayList<>(strategies);
     }
 
     /**
      * Create instance.
      */
     public Locator() {
         this.messageHolder = new DefaultMessageHolder();
-        this.strategies = new ArrayList<LocatorStrategy>();
+        this.strategies = new ArrayList<>();
     }
 
     /**

src/main/java/org/apache/maven/shared/io/logging/DefaultMessageHolder.java

@@ -30,7 +30,7 @@
  */
 public class DefaultMessageHolder implements MessageHolder {
 
-    private List<Message> messages = new ArrayList<Message>();
+    private List<Message> messages = new ArrayList<>();
 
     private Message currentMessage;
 

src/main/java/org/apache/maven/shared/io/logging/MessageLevels.java

@@ -56,7 +56,7 @@ public final class MessageLevels {
     private static final List<String> LEVEL_NAMES;
 
     static {
-        List<String> names = new ArrayList<String>();
+        List<String> names = new ArrayList<>();
         names.add("DEBUG");
         names.add("INFO");
         names.add("WARN");

src/main/java/org/apache/maven/shared/io/scan/AbstractResourceInclusionScanner.java

@@ -32,7 +32,7 @@
  * @version $Id$
  */
 public abstract class AbstractResourceInclusionScanner implements ResourceInclusionScanner {
-    private final List<SourceMapping> sourceMappings = new ArrayList<SourceMapping>();
+    private final List<SourceMapping> sourceMappings = new ArrayList<>();
 
     /** {@inheritDoc} */
     public final void addSourceMapping(SourceMapping sourceMapping) {

src/main/java/org/apache/maven/shared/io/scan/StaleResourceScanner.java

@@ -82,7 +82,7 @@ public Set<File> getIncludedSources(File sourceDir, File targetDir) throws Inclu
 
         String[] potentialIncludes = scanForSources(sourceDir, sourceIncludes, sourceExcludes);
 
-        Set<File> matchingSources = new HashSet<File>();
+        Set<File> matchingSources = new HashSet<>();
 
         for (int i = 0; i < potentialIncludes.length; i++) {
             String path = potentialIncludes[i];

src/main/java/org/apache/maven/shared/io/scan/mapping/SuffixMapping.java

@@ -54,7 +54,7 @@ public SuffixMapping(String sourceSuffix, Set<String> targetSuffixes) {
 
     /** {@inheritDoc} */
     public Set<File> getTargetFiles(File targetDir, String source) {
-        Set<File> targetFiles = new HashSet<File>();
+        Set<File> targetFiles = new HashSet<>();
 
         if (source.endsWith(sourceSuffix)) {
             String base = source.substring(0, source.length() - sourceSuffix.length());

src/test/java/org/apache/maven/shared/io/location/LocatorTest.java

@@ -92,7 +92,7 @@ public void testShouldRemovePreviouslyAddedStrategy() {
     }
 
     public void testResolutionFallsThroughStrategyStackAndReturnsNullIfNotResolved() {
-        List<LocatorStrategy> strategies = new ArrayList<LocatorStrategy>();
+        List<LocatorStrategy> strategies = new ArrayList<>();
 
         strategies.add(new LoggingLocatorStrategy());
         strategies.add(new LoggingLocatorStrategy());

src/test/java/org/apache/maven/shared/io/scan/mapping/SuffixMappingTest.java

@@ -69,7 +69,7 @@ public void testShouldReturnOneClassFileAndOneXmlFileForSingleJavaFile() throws
 
         File basedir = new File(".");
 
-        Set<String> targets = new HashSet<String>();
+        Set<String> targets = new HashSet<>();
         targets.add(".class");
         targets.add(".xml");
 
@@ -90,7 +90,7 @@ public void testShouldReturnNoTargetFilesWhenSourceFileHasWrongSuffix() throws I
 
         File basedir = new File(".");
 
-        Set<String> targets = new HashSet<String>();
+        Set<String> targets = new HashSet<>();
         targets.add(".class");
         targets.add(".xml");