Avoid error on empty Query
Avoid error on empty Query

rwth-acis/LAS2peer-Query-Visualization-Service,rwth-acis/LAS2peer-Query-Visualization-Service,Gordin/LAS2peer-Query-Visualization-Service,rwth-acis/LAS2peer-Query-Visualization-Service,Gordin/LAS2peer-Query-Visualization-Service,Gordin/LAS2peer-Query-Visualization-Service,rwth-acis/LAS2peer-Query-Visualization-Service,Gordin/LAS2peer-Query-Visualization-Service