GifImage#loadFrom(File) has a resource leak

[AlexanderSchuetz97]

public int loadFrom(File file) throws FileNotFoundException {
if (!file.exists()) throw new FileNotFoundException("File does not exist");
return loadFrom(new FileInputStream(file));
}

The FileInputStream is leaked
Change this to:

public int loadFrom(File file) throws FileNotFoundException {
if (!file.exists()) throw new FileNotFoundException("File does not exist");
try(FileInputStream fais = new FileInputStream(file)) {
return this.loadFrom(fais);
}
}