Add logging statements

[codecov[bot]]

Codecov Report

Merging #270 (0b0af92) into master (3e19aa8) will decrease coverage by 0.02%. The diff coverage is 85.71%.

@@             Coverage Diff              @@
##             master     #270      +/-   ##
============================================
- Coverage     74.18%   74.17%   -0.02%     
  Complexity      578      578              
============================================
  Files            88       88              
  Lines          1898     1905       +7     
  Branches        220      221       +1     
============================================
+ Hits           1408     1413       +5     
  Misses          409      409              
- Partials         81       83       +2     

Files	Coverage Δ
...ain/java/seedu/address/logic/commands/Command.java	100.00% <ø> (ø)
...java/seedu/address/logic/commands/EditCommand.java	94.33% <100.00%> (+0.10%)	:arrow_up:
.../seedu/address/logic/parser/EditCommandParser.java	94.44% <ø> (ø)
...in/java/seedu/address/logic/parser/ParserUtil.java	78.48% <ø> (ø)
...eedu/address/logic/parser/RemarkCommandParser.java	85.71% <ø> (ø)
...du/address/logic/parser/UnremarkCommandParser.java	100.00% <ø> (ø)
...va/seedu/address/logic/commands/RemarkCommand.java	90.62% <80.00%> (-5.68%)	:arrow_down: