Looks good overall and nice addition.
However it seems apache lang3 is not available in the full KNIME package in 3.5
You can now:
Remove the few usages of this package (preferred) (e.g. comment out the system variable substitution with a note so that we can add it in a later version)
IO node IndexLoader to read a genome Index (e.g. produced from Yara indexer, Bowtie or BWA) This PR addresses #93