core/src/main/java/io/fabric8/maven/core/util/AsciiDocParser.java
private String readEmptyLineOrEndTable(final BufferedReader tableContent) throws IOException {
        final String column = tableContent.readLine();

        if (column != null && column.startsWith(END_TABLE)) {
            return END_TABLE;
        }

        if(column == null || !column.isEmpty()) {
            throw new IllegalArgumentException(String.format("Trying to read an empty line for end of row, but content %s was found or EOF", column));
        }

        return "";
    }
private String readEmptyLineOrEndTable(final BufferedReader tableContent) throws IOException {
        final String column = tableContent.readLine();

        if (column != null && column.startsWith(END_TABLE)) {
            return END_TABLE;
        }

        if(column == null || !column.isEmpty()) {
            throw new IllegalArgumentException(String.format("Trying to read an empty line for end of row, but content %s was found or EOF", column));
        }

        return "";
    }
Reads empty line or throw an exception if a none empty line was found.