Fixed SORMAS-Foundation#3589

Author: MateStrysewske

sormas-ui/src/main/java/de/symeda/sormas/ui/contact/ContactCreateForm.java

@@ -25,6 +25,7 @@
 
 import org.joda.time.LocalDate;
 
+import com.google.common.collect.Sets;
 import com.vaadin.shared.ui.ContentMode;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Label;
@@ -317,22 +318,22 @@ private void updateContactCategory(ContactProximity proximity) {
 			case FACE_TO_FACE_LONG:
 			case TOUCHED_FLUID:
 			case AEROSOL:
-				contactCategory.setValue(ContactCategory.HIGH_RISK);
+				contactCategory.setValue(Sets.newHashSet(ContactCategory.HIGH_RISK));
 				break;
 			case MEDICAL_UNSAFE:
-				contactCategory.setValue(ContactCategory.HIGH_RISK_MED);
+				contactCategory.setValue(Sets.newHashSet(ContactCategory.HIGH_RISK_MED));
 				break;
 			case MEDICAL_LIMITED:
-				contactCategory.setValue(ContactCategory.MEDIUM_RISK_MED);
+				contactCategory.setValue(Sets.newHashSet(ContactCategory.MEDIUM_RISK_MED));
 				break;
 			case SAME_ROOM:
 			case FACE_TO_FACE_SHORT:
 			case MEDICAL_SAME_ROOM:
-				contactCategory.setValue(ContactCategory.LOW_RISK);
+				contactCategory.setValue(Sets.newHashSet(ContactCategory.LOW_RISK));
 				break;
 			case MEDICAL_DISTANT:
 			case MEDICAL_SAFE:
-				contactCategory.setValue(ContactCategory.NO_RISK);
+				contactCategory.setValue(Sets.newHashSet(ContactCategory.NO_RISK));
 				break;
 			default:
 			}