Don't think this is going to help:

#!/usr/bin/perl -wl

my $artefact = "foo";

my $file = "C:/abc/def/klm/Properties/$artefact.properties";

print $file;

   $file = 'C:/abc/def/klm/Properties/' . $artefact.properties;

print $file;
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gives

$ ./880572.pl
Unquoted string "properties" may clash with future reserved word at ./
+880572.pl line 9.
C:/abc/def/klm/Properties/foo.properties
C:/abc/def/klm/Properties/fooproperties
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and with use strict you'd get

$ ./880572.pl
Bareword "properties" not allowed while "strict subs" in use at ./8805
+72.pl line 10.
Execution of ./880572.pl aborted due to compilation errors.
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use of chomp for the input helped solve the issue.