src/edu/kit/informatik/literatur_system/ConferenceSeries.java
/**
     * Adds a {@linkplain Conference} entity to this
     * @param c the {@linkplain Conference} entity to add
     * @throws InvalidRelationException if there is already a {@linkplain Conference} entity 
     * associated to the year of the given one
     */
Adds a  Conference entity to this
@param c the  Conference entity to add
@throws InvalidRelationException if there is already a  Conference entity
associated to the year of the given one
Adds a Conference entity to this @param c the Conference entity to add @throws InvalidRelationException if there is already a Conference entity associated to the year of the given one
public void addConference(final Conference c) {
        if (conferences.containsKey(c.getYear()))
            throw new InvalidRelationException("there is already a conference in this year for this series");
        conferences.put(c.getYear(), c);
    }
public void addConference ( final Conference c ) { if ( conferences . containsKey ( c . getYear ( ) ) ) throw new InvalidRelationException ( "there is already a conference in this year for this series" ) ; conferences . put ( c . getYear ( ) , c ) ; }
Adds a {@linkplain Conference} entity to this
 @param c the {@linkplain Conference} entity to add
 @throws InvalidRelationException if there is already a {@linkplain Conference} entity
 associated to the year of the given one
Adds a { @linkplain Conference } entity to this @param c the { @linkplain Conference } entity to add @throws InvalidRelationException if there is already a { @linkplain Conference } entity associated to the year of the given one