Use diamond operator.

juliac/core/src/main/java/org/objectweb/fractal/juliac/conf/JuliacConfig.java

@@ -251,7 +251,7 @@ public class JuliacConfig {
          * Retrieve all source files contained in src.
          */
         File baseDir = getBaseDir();
-        List<SourceFile> sfs = new ArrayList<SourceFile>();
+        List<SourceFile> sfs = new ArrayList<>();
         SourceFile.addAllJavaFiles(baseDir,src,sfs);
         
         /*