Thank you both for suggestions.

Btw I've read some man pages and I found perlmod and it has one template:

$ man perlmod |sed -n "/package Some::Module/,/^ \+1; /{p}"
           package Some::Module;  # assumes Some/Module.pm

           use strict;
           use warnings;

           BEGIN {
               require Exporter;

               # set the version for version checking
               our $VERSION     = 1.00;

               # Inherit from Exporter to export functions and variabl
+es
               our @ISA         = qw(Exporter);

               # Functions and variables which are exported by default
               our @EXPORT      = qw(func1 func2);

               # Functions and variables which can be optionally expor
+ted
               our @EXPORT_OK   = qw($Var1 %Hashit func3);
           }

           # exported package globals go here
           our $Var1    = '';
           our %Hashit  = ();

           # non-exported package globals go here
           # (they are still accessible as $Some::Module::stuff)
           our @more    = ();
           our $stuff   = '';

           # file-private lexicals go here, before any functions which
+ use them
           my $priv_var    = '';
           my %secret_hash = ();

           # here's a file-private function as a closure,
           # callable as $priv_func->();
           my $priv_func = sub {
               ...
           };

           # make all your functions, whether exported or not;
           # remember to put something interesting in the {} stubs
           sub func1      { ... }
           sub func2      { ... }

           # this one isn't exported, but could be called directly
           # as Some::Module::func3()
           sub func3      { ... }

           END { ... }       # module clean-up code here (global destr
+uctor)

           1;  # don't forget to return a true value from the file
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