simple javadoc fix for accomodating the newst maven version

[peterbae]

With the newest maven version, they check for the javadoc syntax more rigorously. Made changes to reflect this new maven behavior.

[msftclas]

@peterbae,
Thanks for your contribution as a Microsoft full-time employee or intern. You do not need to sign a CLA.
Thanks,
Microsoft Pull Request Bot

[codecov-io]

Codecov Report

Merging #385 into dev will increase coverage by 0.07%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                dev     #385      +/-   ##
============================================
+ Coverage     40.16%   40.23%   +0.07%     
+ Complexity     1892     1891       -1     
============================================
  Files           107      107              
  Lines         24482    24482              
  Branches       4038     4038              
============================================
+ Hits           9833     9851      +18     
+ Misses        12815    12792      -23     
- Partials       1834     1839       +5

Flag	Coverage Δ	Complexity Δ
#JDBC41	40.02% <ø> (-0.03%)	1883 <ø> (ø)
#JDBC42	40.17% <ø> (+0.16%)	1889 <ø> (+4)	⬆️

Impacted Files	Coverage Δ	Complexity Δ
...m/microsoft/sqlserver/jdbc/SQLServerException.java	77.23% <ø> (ø)	29 <0> (ø)	⬇️
...om/microsoft/sqlserver/jdbc/SimpleInputStream.java	47.4% <0%> (-1.49%)	9% <0%> (-1%)
...om/microsoft/sqlserver/jdbc/ReaderInputStream.java	47.19% <0%> (-1.13%)	16% <0%> (-1%)
...om/microsoft/sqlserver/jdbc/SQLServerBulkCopy.java	49.43% <0%> (-0.08%)	211% <0%> (+1%)
...m/microsoft/sqlserver/jdbc/SQLServerResultSet.java	27.36% <0%> (-0.05%)	187% <0%> (-1%)
...in/java/com/microsoft/sqlserver/jdbc/IOBuffer.java	45.54% <0%> (+0.61%)	0% <0%> (ø)	⬇️
...rc/main/java/com/microsoft/sqlserver/jdbc/DDC.java	30.78% <0%> (+0.67%)	58% <0%> (ø)	⬇️
...a/com/microsoft/sqlserver/jdbc/PLPInputStream.java	40.96% <0%> (+1.2%)	29% <0%> (+1%)	⬆️

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