// For complete examples and data files, please go to https://github.com/groupdocs-comparison/GroupDocs.Comparison-for-Java
InputStream source = new FileInputStream(Utilities.sourcePath + sourceFile);
InputStream target = new FileInputStream(Utilities.targetPath + targetFile);
Comparer comparer = new Comparer();
ICompareResult result = comparer.compare(source, target, new ComparisonSettings());
result.saveDocument(Utilities.outputFileName(extension));